Protesters burn as they stand behind burning barricades during clashes with police on February 20, 2014 in Kiev. Ukraine's embattled leader announced a "truce" with the opposition as he prepared to get grilled by visiting EU diplomats over clashes that killed 26 and left the government facing diplomatic isolation. The shocking scale of the violence three months into the crisis brought expressions of grave concern from the West and condemnation of an "attempted coup" by the Kremlin. AFP PHOTO/BULENT KILIC

Protesters burn as they stand behind burning barricades during clashes with police on February 20, 2014 in Kiev. Ukraine's embattled leader announced a "truce" with the opposition as he prepared to get grilled by visiting EU diplomats over clashes that killed 26 and left the government facing diplomatic isolation. The shocking scale of the violence three months into the crisis brought expressions of grave concern from the West and condemnation of an "attempted coup" by the Kremlin. AFP PHOTO/BULENT KILIC

Protesters carry a wounded protester during clashes with polie, after gaining new positions near the Independence square in Kiev on February 20, 2014. Hundreds of armed protesters charged police barricades Thursday on Kiev's central Independence Square, despite a truce called just hours earlier by the country's embattled president. Protesters pushed the police back about 200 metres and were in control of most of the square they had occupied at the start of Ukraine's three-month-old political crisis. AFP PHOTO / LOUISA GOULIAMAKI

Protesters evacuate a wounded demonstrator from Independence square, dubbed Maidan, in Kiev on February 20, 2014. Hundreds of armed protesters charged police barricades Thursday on Kiev's central Independence Square, despite a truce called just hours earlier by the country's embattled president. Protesters pushed the police back about 200 metres and were in control of most of the square they had occupied at the start of Ukraine's three-month-old political crisis. AFP PHOTO / LOUISA GOULIAMAKI

Protesters evacuate a wounded demonstrator near Independence square in Kiev on February 20, 2014. Hundreds of armed protesters charged police barricades Thursday on Kiev's central Independence Square, despite a truce called just hours earlier by the country's embattled president. Protesters pushed the police back about 200 metres and were in control of most of the square they had occupied at the start of Ukraine's three-month-old political crisis. AFP PHOTO / LOUISA GOULIAMAKI

Paramedics carry a wounded protester in Kiev on February 20, 2014. Hundreds of armed protesters charged police barricades Thursday on Kiev's central Independence Square, despite a truce called just hours earlier by the country's embattled president. Protesters pushed the police back about 200 metres and were in control of most of the square they had occupied at the start of Ukraine's three-month-old political crisis. At least 10 protesters were killed on Thursday in fresh clashes between thousands of demonstrators and heavily-armed riot police in the heart of Kiev, an AFP correspondent at the scene said. AFP PHOTO / LOUISA GOULIAMAKI

Demonstrators sit by the bodies of two anti-government protesters killed by a sniper during clashes with the police in the center of Kiev on February 20, 2014. Live ammunition was being used on Thursday in fresh clashes in the heart of Kiev that claimed the life of at least ten protesters and left about a dozen injured. AFP PHOTO/ SERGEI SUPINSKY

Activists pay respects to protesters killed in clashes with police, in Kiev's Independence Square, the epicenter of the country's current unrest, Thursday, Feb. 20, 2014. Fierce clashes between police and protesters, some including gunfire, shattered a brief truce in Ukraine's besieged capital Thursday, killing numerous people. The deaths came in a new eruption of violence just hours after the country's embattled president and the opposition leaders demanding his resignation called for a truce and negotiations to try to resolve Ukraine's political crisis. (AP Photo/Efrem Lukatsky)

Activists evacuate a wounded protester during clashes with police in Kiev's Independence Square, the epicenter of the country's current unrest, Kiev, Ukraine, Thursday, Feb. 20, 2014. Fierce clashes between police and protesters, some including gunfire, shattered a brief truce in Ukraine's besieged capital Thursday, killing numerous people. The deaths came in a new eruption of violence just hours after the country's embattled president and the opposition leaders demanding his resignation called for a truce and negotiations to try to resolve Ukraine's political crisis. (AP Photo/Efrem Lukatsky)

A protester who was killed in clashes with police lays on the ground in Kiev's Independence Square, the epicenter of the country's current unrest, Kiev, Ukraine, Thursday, Feb. 20, 2014. Fierce clashes between police and protesters, some including gunfire, shattered a brief truce in Ukraine's besieged capital Thursday, killing numerous people. The deaths came in a new eruption of violence just hours after the country's embattled president and the opposition leaders demanding his resignation called for a truce and negotiations to try to resolve Ukraine's political crisis. (AP Photo/Efrem Lukatsky)

An activist covers a protester who was killed in clashes with police, with a flag during clashes with riot police in Kiev's Independence Square, the epicenter of the country's current unrest, Kiev, Ukraine, Thursday, Feb. 20, 2014. Fierce clashes between police and protesters, some including gunfire, shattered a brief truce in Ukraine's besieged capital Thursday, killing numerous people. The deaths came in a new eruption of violence just hours after the country's embattled president and the opposition leaders demanding his resignation called for a truce and negotiations to try to resolve Ukraine's political crisis. (AP Photo/Efrem Lukatsky)

People look at a bullet hole in victim's vest who was killed during a clash between riot police and protesters in Kiev's Independence Square, the epicenter of the country's current unrest, Thursday, Feb. 20, 2014. Fierce clashes between police and protesters, some including gunfire, shattered a brief truce in Ukraine's besieged capital Thursday, killing numerous people. The deaths came in a new eruption of violence just hours after the country's embattled president and the opposition leaders demanding his resignation called for a truce and negotiations to try to resolve Ukraine's political crisis. (AP Photo/Efrem Lukatsky)

People look at protesters who were killed in clashes with police in Kiev's Independence Square, the epicenter of the country's current unrest, Kiev, Ukraine, Thursday, Feb. 20, 2014. Fierce clashes between police and protesters, some including gunfire, shattered a brief truce in Ukraine's besieged capital Thursday, killing numerous people. The deaths came in a new eruption of violence just hours after the country's embattled president and the opposition leaders demanding his resignation called for a truce and negotiations to try to resolve Ukraine's political crisis. (AP Photo/Efrem Lukatsky)

People look at protesters who were killed in clashes with police in Kiev's Independence Square, the epicenter of the country's current unrest, Kiev, Ukraine, Thursday, Feb. 20, 2014. Fierce clashes between police and protesters, some including gunfire, shattered a brief truce in Ukraine's besieged capital Thursday, killing numerous people. The deaths came in a new eruption of violence just hours after the country's embattled president and the opposition leaders demanding his resignation called for a truce and negotiations to try to resolve Ukraine's political crisis. (AP Photo/Efrem Lukatsky)

EDS NOTE GRAPHIC CONTENT -Activists evacuate a wounded protester during clashes with police in Kiev's Independence Square, the epicenter of the country's current unrest, Kiev, Ukraine, Thursday, Feb. 20, 2014. Fierce clashes between police and protesters, some including gunfire, shattered a brief truce in Ukraine's besieged capital Thursday, killing numerous people. The deaths came in a new eruption of violence just hours after the country's embattled president and the opposition leaders demanding his resignation called for a truce and negotiations to try to resolve Ukraine's political crisis. (AP Photo/Efrem Lukatsky)

TOPSHOTS Protesters carry a wounded fellow protester in Kiev on February 20, 2014. Hundreds of armed protesters charged police barricades Thursday on Kiev's central Independence Square, despite a truce called just hours earlier by the country's embattled president. Protesters pushed the police back about 200 metres and were in control of most of the square they had occupied at the start of Ukraine's three-month-old political crisis. AFP PHOTO / LOUISA GOULIAMAKI

Activists pay respects to protesters killed in clashes with police, in Kiev's Independence Square, the epicenter of the country's current unrest, Thursday, Feb. 20, 2014. Fierce clashes between police and protesters, some including gunfire, shattered a brief truce in Ukraine's besieged capital Thursday, killing numerous people. The deaths came in a new eruption of violence just hours after the country's embattled president and the opposition leaders demanding his resignation called for a truce and negotiations to try to resolve Ukraine's political crisis. (AP Photo/Sergei Chuzavkov)

Activists pay respects to protesters killed in clashes with police, in Kiev's Independence Square, the epicenter of the country's current unrest, Thursday, Feb. 20, 2014. Fierce clashes between police and protesters, some including gunfire, shattered a brief truce in Ukraine's besieged capital Thursday, killing numerous people. The deaths came in a new eruption of violence just hours after the country's embattled president and the opposition leaders demanding his resignation called for a truce and negotiations to try to resolve Ukraine's political crisis. (AP Photo/Sergei Chuzavkov)

TOPSHOTS Protesters catch fire as they stand behind burning barricades during clashes with police on February 20, 2014 in Kiev. Ukraine's embattled leader announced a "truce" with the opposition as he prepared to get grilled by visiting EU diplomats over clashes that killed 26 and left the government facing diplomatic isolation. The shocking scale of the violence three months into the crisis brought expressions of grave concern from the West and condemnation of an "attempted coup" by the Kremlin. AFP PHOTO/BULENT KILIC

TOPSHOTS Protesters carry a wounded protester during clashes with polie, after gaining new positions near the Independence square in Kiev on February 20, 2014. Hundreds of armed protesters charged police barricades Thursday on Kiev's central Independence Square, despite a truce called just hours earlier by the country's embattled president. Protesters pushed the police back about 200 metres and were in control of most of the square they had occupied at the start of Ukraine's three-month-old political crisis. AFP PHOTO / LOUISA GOULIAMAKI