People walk inside the burnt Trade Union building where more than 40 people died in a fire during the recent clashes in the South-Ukrainian city of Odessa, Ukraine, on May 5, 2014. More than 40 people were killed on May 03, 2014 in clashes and fire in the House of Trade Unions building taken over by pro-Russian separatists, as they clashed with pro-Ukrainian groups. Photo by Veli Gurgah/AA/ABACAPRESS.COM

People walk inside the burnt Trade Union building where more than 40 people died in a fire during the recent clashes in the South-Ukrainian city of Odessa, Ukraine, on May 5, 2014. More than 40 people were killed on May 03, 2014 in clashes and fire in the House of Trade Unions building taken over by pro-Russian separatists, as they clashed with pro-Ukrainian groups. Photo by Veli Gurgah/AA/ABACAPRESS.COM

People walk inside the burnt Trade Union building where more than 40 people died in a fire during the recent clashes in the South-Ukrainian city of Odessa, Ukraine, on May 5, 2014. More than 40 people were killed on May 03, 2014 in clashes and fire in the House of Trade Unions building taken over by pro-Russian separatists, as they clashed with pro-Ukrainian groups. Photo by Veli Gurgah/AA/ABACAPRESS.COM

People walk inside the burnt Trade Union building where more than 40 people died in a fire during the recent clashes in the South-Ukrainian city of Odessa, Ukraine, on May 5, 2014. More than 40 people were killed on May 03, 2014 in clashes and fire in the House of Trade Unions building taken over by pro-Russian separatists, as they clashed with pro-Ukrainian groups. Photo by Veli Gurgah/AA/ABACAPRESS.COM

People walk inside the burnt Trade Union building where more than 40 people died in a fire during the recent clashes in the South-Ukrainian city of Odessa, Ukraine, on May 5, 2014. More than 40 people were killed on May 03, 2014 in clashes and fire in the House of Trade Unions building taken over by pro-Russian separatists, as they clashed with pro-Ukrainian groups. Photo by Veli Gurgah/AA/ABACAPRESS.COM

Flowers are left inside the burnt Trade Union building in memory of people killed in recent clashes in the South-Ukrainian city of Odessa, Ukraine, on May 5, 2014. More than 40 people were killed on May 03, 2014 in clashes and fire in the House of Trade Unions building taken over by pro-Russian separatists, as they clashed with pro-Ukrainian groups. Photo by Veli Gurgah/AA/ABACAPRESS.COM

A woman places flowers outside the burnt Trade Union building in memory of people killed in recent clashes in the South-Ukrainian city of Odessa, Ukraine, on May 5, 2014. More than 40 people were killed on May 03, 2014 in clashes and fire in the House of Trade Unions building taken over by pro-Russian separatists, as they clashed with pro-Ukrainian groups. Photo by Veli Gurgah/AA/ABACAPRESS.COM

People gather at the burnt Trade Union building in memory of victims killed in recent clashes in the South-Ukrainian city of Odessa, Ukraine, on May 5, 2014. More than 40 people were killed on May 03, 2014 in clashes and fire in the House of Trade Unions building taken over by pro-Russian separatists, as they clashed with pro-Ukrainian groups. Photo by Veli Gurgah/AA/ABACAPRESS.COM

A woman mourns as she visits the burnt Trade Union building in memory of people killed in recent clashes in the South-Ukrainian city of Odessa, Ukraine, on May 5, 2014. More than 40 people were killed on May 03, 2014 in clashes and fire in the House of Trade Unions building taken over by pro-Russian separatists, as they clashed with pro-Ukrainian groups. Photo by Veli Gurgah/AA/ABACAPRESS.COM

A woman places candles outside the burnt Trade Union building in memory of people killed in recent clashes in the South-Ukrainian city of Odessa, Ukraine, on May 5, 2014. More than 40 people were killed on May 03, 2014 in clashes and fire in the House of Trade Unions building taken over by pro-Russian separatists, as they clashed with pro-Ukrainian groups. Photo by Veli Gurgah/AA/ABACAPRESS.COM

Flowers and candles are left outside the burnt Trade Union building in memory of people killed in recent clashes in the South-Ukrainian city of Odessa, Ukraine, on May 5, 2014. More than 40 people were killed on May 03, 2014 in clashes and fire in the House of Trade Unions building taken over by pro-Russian separatists, as they clashed with pro-Ukrainian groups. Photo by Veli Gurgah/AA/ABACAPRESS.COM

People gather at the burnt Trade Union building in memory of victims killed in recent clashes in the South-Ukrainian city of Odessa, Ukraine, on May 5, 2014. More than 40 people were killed on May 03, 2014 in clashes and fire in the House of Trade Unions building taken over by pro-Russian separatists, as they clashed with pro-Ukrainian groups. Photo by Veli Gurgah/AA/ABACAPRESS.COM

People gather at the burnt Trade Union building in memory of victims killed in recent clashes in the South-Ukrainian city of Odessa, Ukraine, on May 5, 2014. More than 40 people were killed on May 03, 2014 in clashes and fire in the House of Trade Unions building taken over by pro-Russian separatists, as they clashed with pro-Ukrainian groups. Photo by Veli Gurgah/AA/ABACAPRESS.COM

Flowers are left at the window of the burnt Trade Union building in memory of people killed in recent clashes in the South-Ukrainian city of Odessa, Ukraine, on May 5, 2014. More than 40 people were killed on May 03, 2014 in clashes and fire in the House of Trade Unions building taken over by pro-Russian separatists, as they clashed with pro-Ukrainian groups. Photo by Veli Gurgah/AA/ABACAPRESS.COM

A woman places flowers at the burnt Trade Union building in memory of people killed in recent clashes in the South-Ukrainian city of Odessa, Ukraine, on May 5, 2014. More than 40 people were killed on May 03, 2014 in clashes and fire in the House of Trade Unions building taken over by pro-Russian separatists, as they clashed with pro-Ukrainian groups. Photo by Veli Gurgah/AA/ABACAPRESS.COM

People gather at the burnt Trade Union building in memory of victims killed in recent clashes in the South-Ukrainian city of Odessa, Ukraine, on May 5, 2014. More than 40 people were killed on May 03, 2014 in clashes and fire in the House of Trade Unions building taken over by pro-Russian separatists, as they clashed with pro-Ukrainian groups. Photo by Veli Gurgah/AA/ABACAPRESS.COM

People gather at the burnt Trade Union building in memory of people killed in recent clashes in the South-Ukrainian city of Odessa, Ukraine, on May 5, 2014. More than 40 people were killed on May 03, 2014 in clashes and fire in the House of Trade Unions building taken over by pro-Russian separatists, as they clashed with pro-Ukrainian groups. Photo by Veli Gurgah/AA/ABACAPRESS.COM

Flowers and candles are left outside the burnt Trade Union building in memory of people killed in recent clashes in the South-Ukrainian city of Odessa, Ukraine, on May 5, 2014. More than 40 people were killed on May 03, 2014 in clashes and fire in the House of Trade Unions building taken over by pro-Russian separatists, as they clashed with pro-Ukrainian groups. Photo by Veli Gurgah/AA/ABACAPRESS.COM

Flowers and candles are left outside the burnt Trade Union building in memory of people killed in recent clashes in the South-Ukrainian city of Odessa, Ukraine, on May 5, 2014. More than 40 people were killed on May 03, 2014 in clashes and fire in the House of Trade Unions building taken over by pro-Russian separatists, as they clashed with pro-Ukrainian groups. Photo by Veli Gurgah/AA/ABACAPRESS.COM

People walk inside the burnt Trade Union building where more than 40 people died in a fire during the recent clashes in the South-Ukrainian city of Odessa, Ukraine, on May 5, 2014. More than 40 people were killed on May 03, 2014 in clashes and fire in the House of Trade Unions building taken over by pro-Russian separatists, as they clashed with pro-Ukrainian groups. Photo by Veli Gurgah/AA/ABACAPRESS.COM

A woman cries back dropped by police troops guarding the burnt trade union building in Odessa, Ukraine, Saturday, May 3, 2014, where more than 30 people died trying to escape during clashes the day before. Odessa had been largely tranquil since the February toppling of President Viktor Yanukovych, who fled to Russia. But clashes erupted Friday between pro-Russians and government supporters in the key port on the Black Sea coast, located 550 kilometers (330 miles) from the turmoil in the east. (AP Photo/Vadim Ghirda)

A man shouts as he gestures in front of police troops guarding the burnt trade union building in Odessa, Ukraine, Saturday, May 3, 2014, where more than 30 people died trying to escape during clashes the day before. Odessa had been largely tranquil since the February toppling of President Viktor Yanukovych, who fled to Russia. But clashes erupted Friday between pro-Russians and government supporters in the key port on the Black Sea coast, located 550 kilometers (330 miles) from the turmoil in the east. (AP Photo/Vadim Ghirda)

A woman cries back dropped by police troops guarding the burnt trade union building in Odessa, Ukraine, Saturday, May 3, 2014, where more than 30 people died trying to escape during clashes the day before. Odessa had been largely tranquil since the February toppling of President Viktor Yanukovych, who fled to Russia. But clashes erupted Friday between pro-Russians and government supporters in the key port on the Black Sea coast, located 550 kilometers (330 miles) from the turmoil in the east. (AP Photo/Vadim Ghirda), APTOPIX

A man shouts as police troops guard the burnt trade union building in Odessa, Ukraine, Saturday, May 3, 2014, where more than 30 people died trying to escape during clashes the day before. Odessa had been largely tranquil since the February toppling of President Viktor Yanukovych, who fled to Russia. But clashes erupted Friday between pro-Russians and government supporters in the key port on the Black Sea coast, located 550 kilometers (330 miles) from the turmoil in the east. (AP Photo/Vadim Ghirda)

People throw flowers as they set up a makeshift memorial outside the burnt trade union building in Odessa, Ukraine, Saturday, May 3, 2014. Tensions in Ukraine heightened sharply after at least 42 people died in clashes between government supporters and opponents in Odessa on Friday. The clash began with street fighting between the two sides in which as least three people were reported killed by gunfire, then turned into a grisly conflagration when government opponents took refuge in a building that caught fire after protesters threw firebombs inside. (AP Photo/Vadim Ghirda)

A woman wearing a hospital protection outfit walks past police troops guarding the burnt trade union building in Odessa, Ukraine, Saturday, May 3, 2014. Tensions in Ukraine heightened sharply after at least 42 people died in clashes between government supporters and opponents in Odessa on Friday. The clash began with street fighting between the two sides in which as least three people were reported killed by gunfire, then turned into a grisly conflagration when government opponents took refuge in a building that caught fire after protesters threw firebombs inside. (AP Photo/Vadim Ghirda)

A pro-Russian activist breaks a window of the offices of Industrial Union of Donbass Corporation in Donetsk, eastern Ukraine, Saturday, May 3, 2014, which has been captured to honor the memory of fallen comrades during fighting with pro-Ukrainian activists in Odessa on Friday. The building houses the offices of Industrial Union of Donbass Corporation, owned by government-appointed Donetsk region governor and billionaire Serhiy Taruta. No police were deployed to block the building takeover. (AP Photo/Evgeniy Maloletka), APTOPIX

A pro-Russian activist burns a Ukrainian national flag and security documents seized from the Ukrainian regional office of the Security Service in Donetsk, eastern Ukraine, Saturday, May 3, 2014, which has been captured to honor the memory of fallen comrades during fighting with pro-Ukrainian activists in Odessa on Friday. In Donetsk, the largest city in the insurgent east, demonstrators who stormed the local office of the Ukrainian Security Service on Saturday evening shouted "We will not forgive Odessa". No police were deployed to block the building takeover. (AP Photo/Evgeniy Maloletka)

Police troops guard the burnt trade union building in Odessa, Ukraine, Saturday, May 3, 2014. Tensions in Ukraine heightened sharply after at least 42 people died in clashes between government supporters and opponents in Odessa on Friday. The clash began with street fighting between the two sides in which as least three people were reported killed by gunfire, then turned into a grisly conflagration when government opponents took refuge in a building that caught fire after protesters threw firebombs inside. (AP Photo/Vadim Ghirda)

Pro-Russian activists brake the glass of the offices of Industrial Union of Donbass Corporation in Donetsk, eastern Ukraine, Saturday, May 3, 2014, which has been captured to honor the memory of fallen comrades during fighting with pro-Ukrainian activists in Odessa on Friday. The building houses the offices of Industrial Union of Donbass Corporation, owned by government-appointed Donetsk region governor and billionaire Serhiy Taruta. No police were deployed to block the building takeover. (AP Photo/Evgeniy Maloletka)

A Pro-Russian activists breaks the glass of the offices of Industrial Union of Donbass Corporation in Donetsk, eastern Ukraine, Saturday, May 3, 2014, which has been captured to honor the memory of fallen comrades during fighting with pro-Ukrainian activists in Odessa on Friday. The building houses the offices of Industrial Union of Donbass Corporation, owned by government-appointed Donetsk region governor and billionaire Serhiy Taruta. No police were deployed to block the building takeover.(AP Photo/Evgeniy Maloletka)

A pro-Russian activist holds a police shield inside a room in the offices of Industrial Union of Donbass Corporation in Donetsk, eastern Ukraine, Saturday, May 3, 2014, which has been captured to honor the memory of fallen comrades during fighting with pro-Ukrainian activists in Odessa on Friday. The building houses the offices of Industrial Union of Donbass Corporation, owned by government-appointed Donetsk region governor and billionaire Serhiy Taruta. No police were deployed to block the building takeover. (AP Photo/Evgeniy Maloletka)

A pro Russian woman cheers in the main hall of the Industrial Union of Donbass Corporation in Donetsk, eastern Ukraine, Saturday, May 3, 2014, which has been captured to honor the memory of fallen comrades during fighting with pro-Ukrainian activists in Odessa on Friday. The building houses the offices of Industrial Union of Donbass Corporation, owned by government-appointed Donetsk region governor and billionaire Serhiy Taruta. No police were deployed to block the building takeover. (AP Photo/Manu Brabo) , APTOPIX

A pro-Russian activist throws a armchair through a window of the offices of Industrial Union of Donbass Corporation in Donetsk, eastern Ukraine, Saturday, May 3, 2014, which has been captured to honor the memory of fallen comrades during fighting with pro-Ukrainian activists in Odessa on Friday. The building houses the offices of Industrial Union of Donbass Corporation, owned by government-appointed Donetsk region governor and billionaire Serhiy Taruta. No police were deployed to block the building takeover. (AP Photo/Evgeniy Maloletka)

A masked pro-Russian activist sits in front of a computer inside a room in the offices of Industrial Union of Donbass Corporation in Donetsk, eastern Ukraine, Saturday, May 3, 2014, which has been captured to honor the memory of fallen comrades during fighting with pro-Ukrainian activists in Odessa on Friday. The building houses the offices of Industrial Union of Donbass Corporation, owned by government-appointed Donetsk region governor and billionaire Serhiy Taruta. No police were deployed to block the building takeover. (AP Photo/Evgeniy Maloletka)

Pro-Russian activists are seen through a break in the glass of the offices of Industrial Union of Donbass Corporation in Donetsk, eastern Ukraine, Saturday, May 3, 2014, which has been captured to honor the memory of fallen comrades during fighting with pro-Ukrainian activists in Odessa on Friday. The building houses the offices of Industrial Union of Donbass Corporation, owned by government-appointed Donetsk region governor and billionaire Serhiy Taruta. No police were deployed to block the building takeover. (AP Photo/Evgeniy Maloletka)

Pro-Russian activist waves a Donetsk republic flag in front of the offices of Industrial Union of Donbass Corporation in Donetsk, eastern Ukraine, Saturday, May 3, 2014, which has been captured to honor the memory of fallen comrades during fighting with pro-Ukrainian activists in Odessa on Friday. The building houses the offices of Industrial Union of Donbass Corporation, owned by government-appointed Donetsk region governor and billionaire Serhiy Taruta. No police were deployed to block the building takeover. (AP Photo/Evgeniy Maloletka), APTOPIX

A pro-Russian activist throws a chair against a window of the offices of Industrial Union of Donbass Corporation in Donetsk, eastern Ukraine, Saturday, May 3, 2014, which has been captured to honor the memory of fallen comrades during fighting with pro-Ukrainian activists in Odessa on Friday. The building houses the offices of Industrial Union of Donbass Corporation, owned by government-appointed Donetsk region governor and billionaire Serhiy Taruta. No police were deployed to block the building takeover.(AP Photo/Manu Brabo)

Pro-Russian activists shout "We will not forgive Odessa" in front of the offices of Industrial Union of Donbass Corporation in Donetsk, eastern Ukraine, Saturday, May 3, 2014, which has been captured to honor the memory of fallen comrades during fighting with pro-Ukrainian activists in Odessa on Friday. The building houses the offices of Industrial Union of Donbass Corporation, owned by government-appointed Donetsk region governor and billionaire Serhiy Taruta. No police were deployed to block the building takeover. (AP Photo/Evgeniy Maloletka)

Police troops guard the burnt trade union building in Odessa, Ukraine, Saturday, May 3, 2014. Tensions in Ukraine heightened sharply after at least 42 people died in clashes between government supporters and opponents in Odessa on Friday. The clash began with street fighting between the two sides in which as least three people were reported killed by gunfire, then turned into a grisly conflagration when government opponents took refuge in a building that caught fire after protesters threw firebombs inside. (AP Photo/Vadim Ghirda)

Police troops guard the burnt trade union building in Odessa, Ukraine, Saturday, May 3, 2014. Tensions in Ukraine heightened sharply after at least 42 people died in clashes between government supporters and opponents in Odessa on Friday. The clash began with street fighting between the two sides in which as least three people were reported killed by gunfire, then turned into a grisly conflagration when government opponents took refuge in a building that caught fire after protesters threw firebombs inside. (AP Photo/Vadim Ghirda)

A man holds flowers as people prepare to set up a makeshift memorial outside the burnt trade union building in Odessa, Ukraine, Saturday, May 3, 2014. Tensions in Ukraine heightened sharply after at least 42 people died in clashes between government supporters and opponents in Odessa on Friday. The clash began with street fighting between the two sides in which as least three people were reported killed by gunfire, then turned into a grisly conflagration when government opponents took refuge in a building that caught fire after protesters threw firebombs inside. (AP Photo/Vadim Ghirda)

A woman takes a photo as police troops guard the burnt trade union building in Odessa, Ukraine, Saturday, May 3, 2014. Tensions in Ukraine heightened sharply after at least 42 people died in clashes between government supporters and opponents in Odessa on Friday. The clash began with street fighting between the two sides in which as least three people were reported killed by gunfire, then turned into a grisly conflagration when government opponents took refuge in a building that caught fire after protesters threw firebombs inside. (AP Photo/Vadim Ghirda)

A man holds a wooden cross as people prepare to set up a makeshift memorial outside the burnt trade union building in Odessa, Ukraine, Saturday, May 3, 2014. Tensions in Ukraine heightened sharply after at least 42 people died in clashes between government supporters and opponents in Odessa on Friday. The clash began with street fighting between the two sides in which as least three people were reported killed by gunfire, then turned into a grisly conflagration when government opponents took refuge in a building that caught fire after protesters threw firebombs inside. (AP Photo/Vadim Ghirda)

Pro-Russian activists shout "We will not forgive Odessa" as they gather to honor the memory of fallen comrades during fighting with pro-Ukrainian activists in Odessa on Friday, at the barricades in front of the administration building in Donetsk, eastern Ukraine, Saturday, May 3, 2014. Tensions in Ukraine heightened sharply after at least 42 people died in clashes between government supporters and opponents in the Black Sea port of Odessa on Friday. (AP Photo/Alexander Zemlianichenko)

Pro-Russian activists burn security documents seized when mobs stormed the Ukrainian regional office of the Security Service in Donetsk, eastern Ukraine, Saturday, May 3, 2014, which has been captured to honor the memory of fallen comrades during fighting with pro-Ukrainian activists in Odessa on Friday. In Donetsk, the largest city in the insurgent east, demonstrators who stormed the local office of the Ukrainian Security Service on Saturday evening shouted "We will not forgive Odessa." No police were deployed to block the building takeover. (AP Photo/Alexander Zemlianichenko)

Pro-Russian protesters break up the words "Ukrainian the Security Service" next to the Ukrainian regional office of the Security Service in Donetsk, eastern Ukraine, Saturday, May 3, 2014, which has been captured to honor the memory of fallen comrades during fighting with pro-Ukrainian activists in Odessa on Friday. In Donetsk, the largest city in the insurgent east, demonstrators who stormed the local office of the Ukrainian Security Service on Saturday evening shouted "We will not forgive Odessa." No police were deployed to block the building takeover. (AP Photo/Alexander Zemlianichenko)

ODESSA, UKRAINE - MAY 2: According to Ukrainian Interior ministry, one dead and many other wounded in a clashes in Odesssa, caused after Pro-Russia activists clashed with supporters of Kiev in the street of Odessa, Ukraine on May 2, 2014. Football fans also took part in rally, Police confirmed a death of one pro-Ukraine activist. He was shot. More than 20 people were injured. (Maksym Voytenko - Anadolu Agency) Photo by Maksym Voytenko/AA/ABACAPRESS.COM

ODESSA, UKRAINE - MAY 2: According to Ukrainian Interior ministry, one dead and many other wounded in a clashes in Odesssa, caused after Pro-Russia activists clashed with supporters of Kiev in the street of Odessa, Ukraine on May 2, 2014. Football fans also took part in rally, Police confirmed a death of one pro-Ukraine activist. He was shot. More than 20 people were injured. (Maksym Voytenko - Anadolu Agency) Photo by Maksym Voytenko/AA/ABACAPRESS.COM

ODESSA, UKRAINE - MAY 2: According to Ukrainian Interior ministry, one dead and many other wounded in a clashes in Odesssa, caused after Pro-Russia activists clashed with supporters of Kiev in the street of Odessa, Ukraine on May 2, 2014. Football fans also took part in rally, Police confirmed a death of one pro-Ukraine activist. He was shot. More than 20 people were injured. (Maksym Voytenko - Anadolu Agency) Photo by Maksym Voytenko/AA/ABACAPRESS.COM

ODESSA, UKRAINE - MAY 2: According to Ukrainian Interior ministry, one dead and many other wounded in a clashes in Odesssa, caused after Pro-Russia activists clashed with supporters of Kiev in the street of Odessa, Ukraine on May 2, 2014. Football fans also took part in rally, Police confirmed a death of one pro-Ukraine activist. He was shot. More than 20 people were injured. (Maksym Voytenko - Anadolu Agency) Photo by Maksym Voytenko/AA/ABACAPRESS.COM

ODESSA, UKRAINE - MAY 2: According to official information, 38 people died in a fire and 30 others were poisoned by carbon monoxide, in a building, during a clash, started between pro-Russian and pro-Ukrainian activists in the centre of Odessa and moved to the Kulikovo field, an area in which the pro-Russian activists' camp was situated and then was captured by pro Ukrainian activists, in Odessa, Ukraine, on May 2, 2014. 50 people, including 10 policemen, asked for medical care during the clashes. (Maksym Voytenko - Anadolu Agency) Photo by Maksym Voytenko/AA/ABACAPRESS.COM

ODESSA, UKRAINE - MAY 2: According to official information, 38 people died in a fire and 30 others were poisoned by carbon monoxide, in a building, during a clash, started between pro-Russian and pro-Ukrainian activists in the centre of Odessa and moved to the Kulikovo field, an area in which the pro-Russian activists' camp was situated and then was captured by pro Ukrainian activists, in Odessa, Ukraine, on May 2, 2014. 50 people, including 10 policemen, asked for medical care during the clashes. (Maksym Voytenko - Anadolu Agency) Photo by Maksym Voytenko/AA/ABACAPRESS.COM

ODESSA, UKRAINE - MAY 2: According to official information, 38 people died in a fire and 30 others were poisoned by carbon monoxide, in a building, during a clash, started between pro-Russian and pro-Ukrainian activists in the centre of Odessa and moved to the Kulikovo field, an area in which the pro-Russian activists' camp was situated and then was captured by pro Ukrainian activists, in Odessa, Ukraine, on May 2, 2014. 50 people, including 10 policemen, asked for medical care during the clashes. (Maksym Voytenko - Anadolu Agency) Photo by Maksym Voytenko/AA/ABACAPRESS.COM

ODESSA, UKRAINE - MAY 2: According to Ukrainian Interior ministry, one dead and many other wounded in a clashes in Odesssa, caused after Pro-Russia activists clashed with supporters of Kiev in the street of Odessa, Ukraine on May 2, 2014. Football fans also took part in rally, Police confirmed a death of one pro-Ukraine activist. He was shot. More than 20 people were injured. (Maksym Voytenko - Anadolu Agency) Photo by Maksym Voytenko/AA/ABACAPRESS.COM

Ukrainian government supporters with a Ukrainian flag, prepare for a clash with pro-Russians in the Black Sea port of Odessa, Ukraine, Friday, May 2, 2014. A clash broke out late Friday between pro-Russians and government supporters in Odessa, on the Black Sea coast some 550 kilometers (330 miles) from the turmoil in the east. Odessa had remained largely untroubled by unrest since the February toppling of pro-Russia President Viktor Yanukovych, which ignited tensions in the east. (AP Photo / Sergei Poliakov)

A Ukrainian government supporter walks past a line of self-defense activists during a clash with pro-Russians in the Black Sea port of Odessa, Ukraine, Friday, May 2, 2014. A clash broke out late Friday between pro-Russians and government supporters in Odessa, on the Black Sea coast some 550 kilometers (330 miles) from the turmoil in the east. Odessa had remained largely untroubled by unrest since the February toppling of pro-Russia President Viktor Yanukovych, which ignited tensions in the east. (AP Photo/Sergei Poliakov)

Ukrainian government supporters dig for stones during a clash with pro-Russians in the Black Sea port of Odessa, Ukraine, Friday, May 2, 2014. A clash broke out late Friday between pro-Russians and government supporters in Odessa, on the Black Sea coast some 550 kilometers (330 miles) from the turmoil in the east. Odessa had remained largely untroubled by unrest since the February toppling of pro-Russia President Viktor Yanukovych, which ignited tensions in the east. (AP Photo/Sergei Poliakov)

Ukrainian government supporters clash with pro-Russians in the Black Sea port of Odessa, Ukraine, Friday, May 2, 2014. A clash broke out late Friday between pro-Russians and government supporters in Odessa, on the Black Sea coast some 550 kilometers (330 miles) from the turmoil in the east. Odessa had remained largely untroubled by unrest since the February toppling of pro-Russia President Viktor Yanukovych, which ignited tensions in the east. (AP Photo/Sergei Poliakov)

A Ukrainian government supporter carries stones during a clash with pro-Russians in the Black Sea port of Odessa, Ukraine, Friday, May 2, 2014. A clash broke out late Friday between pro-Russians and government supporters in Odessa, on the Black Sea coast some 550 kilometers (330 miles) from the turmoil in the east. Odessa had remained largely untroubled by unrest since the February toppling of pro-Russia President Viktor Yanukovych, which ignited tensions in the east. (AP Photo/Sergei Poliakov)

Pro-Ukrainian supporters wave national flags outside the burnt trade union building where more than 30 people died trying to escape during clashes in Odessa, Ukraine, on Friday, May 2, 2014. Odessa had been largely tranquil since the February toppling of President Viktor Yanukovych, who fled to Russia. But clashes erupted Friday between pro-Russians and government supporters in the key port on the Black Sea coast, located 550 kilometers (330 miles) from the turmoil in the east. (AP Photo/Sergei Poliakov)

Ukrainian police guard the burnt trade union building where more than 30 people died trying to escape during clashes in Odessa, Ukraine, on Friday, May 2, 2014. Odessa had been largely tranquil since the February toppling of President Viktor Yanukovych, who fled to Russia. But clashes erupted Friday between pro-Russians and government supporters in the key port on the Black Sea coast, located 550 kilometers (330 miles) from the turmoil in the east. (AP Photo/Sergei Poliakov)

Trashed items are smoldering among debris at a square following clashes in Odessa, Ukraine, on Friday, May 2, 2014. Odessa had been largely tranquil since the February toppling of President Viktor Yanukovych, who fled to Russia. But clashes erupted Friday between pro-Russians and government supporters in the key port on the Black Sea coast, located 550 kilometers (330 miles) from the turmoil in the east. (AP Photo/Sergei Poliakov)

Pro-Ukrainian supporters sort through rubbish outside the burnt trade union building where more than 30 people died trying to escape during clashes in Odessa, Ukraine, on Friday, May 2, 2014. Odessa had been largely tranquil since the February toppling of President Viktor Yanukovych, who fled to Russia. But clashes erupted Friday between pro-Russians and government supporters in the key port on the Black Sea coast, located 550 kilometers (330 miles) from the turmoil in the east. (AP Photo/Sergei Poliakov)

An entrance to the burnt trade union building is seen following clashes which more than 30 people died trying to escape in Odessa, Ukraine, on Friday, May 2, 2014. Odessa had been largely tranquil since the February toppling of President Viktor Yanukovych, who fled to Russia. But clashes erupted Friday between pro-Russians and government supporters in the key port on the Black Sea coast, located 550 kilometers (330 miles) from the turmoil in the east. (AP Photo/Sergei Poliakov)

A firefighter puts off burning rubbish outside the burnt trade union building where more than 30 people died trying to escape during clashes in Odessa, Ukraine, on Friday, May 2, 2014. Odessa had been largely tranquil since the February toppling of President Viktor Yanukovych, who fled to Russia. But clashes erupted Friday between pro-Russians and government supporters in the key port on the Black Sea coast, located 550 kilometers (330 miles) from the turmoil in the east. (AP Photo/Sergei Poliakov)

Pro-Ukrainian supporters gather outside the burnt trade union building where more than 30 people died trying to escape during clashes in Odessa, Ukraine, on Friday, May 2, 2014. Odessa had been largely tranquil since the February toppling of President Viktor Yanukovych, who fled to Russia. But clashes erupted Friday between pro-Russians and government supporters in the key port on the Black Sea coast, located 550 kilometers (330 miles) from the turmoil in the east. (AP Photo/Sergei Poliakov)

Firefighters evacuate an injured man outside the burnt trade union building where more than 30 people died trying to escape during clashes in Odessa, Ukraine, on Friday, May 2, 2014. Odessa had been largely tranquil since the February toppling of President Viktor Yanukovych, who fled to Russia. But clashes erupted Friday between pro-Russians and government supporters in the key port on the Black Sea coast, located 550 kilometers (330 miles) from the turmoil in the east. (AP Photo/Sergei Poliakov)

This image made from AP video shows a building on fire in Odessa, Ukraine, on Friday, May 2, 2014. Deadly clashes took place in the southern Ukraine port of Odessa on Friday, triggered by Ukraine's offensive to recapture the eastern city of Slovyansk from pro-Russia forces. (AP Photo via AP Video)

This image made from AP video shows people carrying a scaffolding frame through fires on the ground in Odessa, Ukraine, on Friday, May 2, 2014. Deadly clashes took place in the southern Ukraine port of Odessa on Friday, triggered by Ukraine's offensive to recapture the eastern city of Slovyansk from pro-Russia forces. (AP Photo via AP Video)

This image made from AP video shows a building on fire in Odessa, Ukraine, on Friday, May 2, 2014. Deadly clashes took place in the southern Ukraine port of Odessa on Friday, triggered by Ukraine's offensive to recapture the eastern city of Slovyansk from pro-Russia forces. (AP Photo via AP Video)

This still grabbed on TV images released by INTER, shows a man covering the bloodied body of a man with an Ukrainian flag during a demonstration on May 2, 2014 in Odessa. Hundreds of pro-Russian militants swinging batons and wearing helmets on Friday attacked a rally of 1,500 people in Ukraine's southern port city of Odessa demonstrating for national unity, an AFP journalist said. Police intervened to try to break up the violence, which left dozens wounded on both sides. Odessa, which has around one million inhabitants, had up to now been relatively spared the unrest wracking east Ukraine. The death toll from clashes between pro-Russian militants and supporters of Ukrainian unity in the southern port city of Odessa on Friday has climbed to three, police said. RESTRICTED TO EDITORIAL USE - MANDATORY CREDIT "AFP PHOTO / INTER" - NO COMMERCIAL USE - NO SALE

Pro-Ukrainian football fans clash with pro-Russian activists who allegedly attacked them prior to a Ukrainian Premier League football match Chornomorets Odessa vs Metalist Kharkiv in Odessa on May 2, 2014. More than 30 people died in a "criminal" blaze in Ukraine's southern city of Odessa on Friday after a day of violent clashes between pro-Russian and pro-Ukrainian militants, according to officials. Some local media reported that pro-Russian militants were believed to have been in the building at the time, and that petrol bombs were lobbed between the building and a group of pro-Kiev militants. AFP PHOTO/ STR

Pro-Ukrainian football fans clash with pro-Russian activists who allegedly attacked them prior to a Ukrainian Premier League football match Chornomorets Odessa vs Metalist Kharkiv in Odessa on May 2, 2014. More than 30 people died in a "criminal" blaze in Ukraine's southern city of Odessa on Friday after a day of violent clashes between pro-Russian and pro-Ukrainian militants, according to officials. Some local media reported that pro-Russian militants were believed to have been in the building at the time, and that petrol bombs were lobbed between the building and a group of pro-Kiev militants. AFP PHOTO/ STR

Ukraine police forces stand guard (R) as pro-Ukrainian football fans clash with pro-Russian activists prior to a Ukrainian Premier League football match Chornomorets Odessa vs Metalist Kharkiv in Odessa on May 2, 2014. More than 30 people died in a "criminal" blaze in Ukraine's southern city of Odessa on Friday after a day of violent clashes between pro-Russian and pro-Ukrainian militants, according to officials. Some local media reported that pro-Russian militants were believed to have been in the building at the time, and that petrol bombs were lobbed between the building and a group of pro-Kiev militants. AFP PHOTO/ STR

Police stand guard in front of the burned Trade Union building late on May 2, 2014. More than 30 people were killed in a "criminal" blaze in Ukraine's southern city of Odessa, as violence spread across the country during the bloodiest day since Kiev's Western-backed government took power. Ukraine's interior ministry said at least 31 people had died in the fire Friday, with local media reporting that pro-Russian militants were believed to have been in the burning building at the time. Most of those who were killed died from smoke inhalation, while others perished trying to escape by jumping out of windows. Russia said it was "outraged" as the scenic port city became a new front in an escalating months-long crisis that has sparked fears of a Russian invasion. AFP PHOTO / STRINGER

People watch as firefighters work at the burned Trade Union building late on May 2, 2014 in Odessa. More than 30 people were killed in a "criminal" blaze in Ukraine's southern city of Odessa, as violence spread across the country during the bloodiest day since Kiev's Western-backed government took power. Ukraine's interior ministry said at least 31 people had died in the fire Friday, with local media reporting that pro-Russian militants were believed to have been in the burning building at the time. Most of those who were killed died from smoke inhalation, while others perished trying to escape by jumping out of windows. Russia said it was "outraged" as the scenic port city became a new front in an escalating months-long crisis that has sparked fears of a Russian invasion. AFP PHOTO / STRINGER

People watch as firefighters work at the burned Trade Union building late on May 2, 2014 in Odessa. More than 30 people were killed in a "criminal" blaze in Ukraine's southern city of Odessa, as violence spread across the country during the bloodiest day since Kiev's Western-backed government took power. Ukraine's interior ministry said at least 31 people had died in the fire Friday, with local media reporting that pro-Russian militants were believed to have been in the burning building at the time. Most of those who were killed died from smoke inhalation, while others perished trying to escape by jumping out of windows. Russia said it was "outraged" as the scenic port city became a new front in an escalating months-long crisis that has sparked fears of a Russian invasion. AFP PHOTO / STRINGER

People watch as firefighters work at the burned Trade Union building late on May 2, 2014 in Odessa. More than 30 people were killed in a "criminal" blaze in Ukraine's southern city of Odessa, as violence spread across the country during the bloodiest day since Kiev's Western-backed government took power. Ukraine's interior ministry said at least 31 people had died in the fire Friday, with local media reporting that pro-Russian militants were believed to have been in the burning building at the time. Most of those who were killed died from smoke inhalation, while others perished trying to escape by jumping out of windows. Russia said it was "outraged" as the scenic port city became a new front in an escalating months-long crisis that has sparked fears of a Russian invasion. AFP PHOTO / STRINGER