Ukraine's President Viktor Yanukovych (L) welcomes former Polish President Aleksander Kwasniewski during their meeting in Kiev on September 9, 2011. AFP PHOTO/ POOL/ MYKHAYLO MARKIV

Ukrainian President Viktor Yanukovych (L) welcomes Polish Prime Minister Donald Tusk for talks during their meeting in Kiev on April 13, 2011. AFP PHOTO/ POOL/GLEB GARANICH

Ukrainian President Viktor Yanukovych, left, and his Polish counterpart Bronislaw Komorowski, right, listen to their national anthems before an official dinner at the Presidential Palace in Warsaw, Poland, Thursday, Feb. 3, 2011. Yanukovych is in Poland for a two-day official visit. (AP Photo/Alik Keplicz, Pool)

Ukraine's President Viktor Yanukovych, right, and Poland's President Bronislaw Komorowski speak during a session at the World Economic Forum in Davos, Switzerland on Friday, Jan. 28, 2011. In a nod to the post-crisis atmosphere, the World Economic Forum shifts its attention on Friday to austerity measures and priorities for improving the economy. (AP Photo/Virginia Mayo)

Ukraine's President Viktor Yanukovych smiles during a press conference devoted to the hundred days of his presidency in Kiev on June 4, 2010. President Viktor Yanukovych said for the first time today that Ukraine was against recognizing Georgia's rebel regions, dashing Russian hopes Kiev will support one of Moscow's most controversial policies. AFP PHOTO/ SERGEI SUPINSKY

(FILES) -- A file photo taken on February 25, 2010 shows Ukraine's President Viktor Yanukovych holding the presidential certificate after he took oath in the parliament in Kiev. Yanukovych has left Kiev, opposition leader Vitali Klitschko said on February 22, 2014, amid reports that the president has fled the country altogether following a week of deadly violence. "He has left the capital," Klitschko told parliament, also calling for early presidential elections before May 25. AFP PHOTO/POOL/ANASTASIA SIROTKINA

(FILES) This picture taken on January 18, 2010 shows then Ukrainian opposition leader, and presidential election candidate Viktor Yanukovich during a press conference in his headquarters in Kiev. Anti-government protesters on February 18, 2014 Tuesday smashed their way into the party headquarters of embattled President Viktor Yanukovych, an AFP reporter at the scene said. Part of the building was on fire after several hundred protesters hurled Molotov cocktails at it following fierce clashes with the police close to the nearby building of the Ukrainian parliament. AFP PHOTO / ALEXANDER NEMENOV

PHOTO: EAST NEWS/VITALY KORZHUKOV 29.06.2006, Kiev, Ukraine. Deputowani Partii Regionow drugi dzien blokuja mownice Rady Najwyzszej Nz. Viktor Yanukovich Deputees of Regions Party - Viktor Yanukovych - blockade parliament

Supporters of opposition leader Viktor Yushchenko watch TV news broadcast with the preliminary presdiential election results on a giant screen during a rally at the Independence square in Kiev, Monday, Dec. 27, 2004. With ballots counted from 99.7 percent of precincts, official results gave Yushchenko 52.1 percent of the votes compared with 44.1 percent for Kremlin-backed Prime Minister Viktor Yanukovych. Yushchenko held a 2.3 million-vote lead with just 100,000 votes remaining to be counted at 133 polling stations.Just more than 77 percent of eligible voters cast ballots. (AP Photo/Ivan Sekretarev)

Prime Minister Viktor Yanukovych reacts whilst listening to questions during his news conference in Kiev Monday, Dec. 27, 2004. Prime Minister Viktor Yanukovych refused Monday to concede defeat in Ukraine's weekend presidential election, and said he would go to the Supreme Court to challenge the results. (AP Photo/Ivan Sekretarev)

Prime Minister Viktor Yanukovych answers a question during his news conference in Kiev Monday, Dec. 27, 2004. Yanukovych refused Monday to concede defeat in Ukraine's weekend presidential election, and said he would go to the Supreme Court to challenge the results. (AP Photo/Ivan Sekretarev)

Ukraine's Prime Minister and a presidential candidate Viktor Yushchenko leaves a cabin to vote at a polling station, Kiev, Sunday, Dec. 26, 2004. Rival candidates Viktor Yushchenko and Viktor Yanukovych faced off Sunday in a repeat election triggered by a fraudulent runoff vote and massive protests that resulted in an unprecedented third round in Ukraine's fiercely waged presidential contest.(AP Photo/Stepan Chuyko)

Ukraine's Prime Minister and presidential candidate Viktor Yanukovych looks on during a news conference in Kiev, Sunday, Dec. 26, 2004. Rival candidates Viktor Yushchenko and Viktor Yanukovych faced off Sunday in a repeat election triggered by a fraudulent runoff vote and massive protests that resulted in an unprecedented third round in Ukraine's fiercely waged presidential contest. (AP Photo/Stepan Chuyko)

Ukraine's Prime Minister and a presidential candidate Viktor Yushchenko waves while leaving a polling station, Kiev, Sunday, Dec. 26, 2004. Rival candidates Viktor Yushchenko and Viktor Yanukovych faced off Sunday in a repeat election triggered by a fraudulent runoff vote and massive protests that resulted in an unprecedented third round in Ukraine's fiercely waged presidential contest.(AP Photo/Stepan Chuyko)

Ukraine's Prime Minister Viktor Yanukovych looks at about 10,000 of his supporters during a rally at Kiev's Victory Square, Friday, Dec. 24, 2004 with Ukrainian national flag flying at the background. The bitter election campaign has underscored stark differences between Ukraine's pro-Yanukovych Russian-speaking east and the western and central parts of the country from where Yushchenko draws his support. Some eastern regions have said they might pursue autonomy if Western-backed Yushchenko wins. Ukrainians will revote at the presidential elections on Sunday. (AP Photo/Ivan Sekretarev)

Ukraine's Prime Minister Viktor Yanukovych greets about 10,000 of his supporters during a rally at Kiev Victory Square Friday, Dec. 24, 2004. The bitter election campaign has underscored stark differences between Ukraine's pro-Yanukovych Russian-speaking east and the western and central parts of the country from where Yushchenko draws his support. Some eastern regions have said they might pursue autonomy if Western-backed Yushchenko wins. Ukrainians will revote at the presidential elections on Sunday. (AP Photo/Ivan Sekretarev)

Supporters of Ukrainian Prime Minister Viktor Yanukovych, the official winner of Ukraine's presidential election, wave flags in front of his portrait on a poster, during a rally at the central square in Donetsk, an industrial city in eastern Ukraine, Tuesday, Nov. 30, 2004. Ukraine's Supreme Court on Tuesday resumed its investigation into bitterly disputed election results, while regional leaders in eastern Ukraine backpedalled on threats to resist central rule if the opposition leader is declared president. (AP Photo/Sergei Grits)

A pedestrian passes by a poster of Ukrainian Prime Minister Viktor Yanukovych, the official winner of Ukraine's presidential election, on central square in Donetsk, an industrial city in eastern Ukraine, Monday, Nov. 29, 2004. The legislature in Ukraine's eastern Donetsk region voted Sunday to hold a referendum on autonomy for the province, raising the stakes in a struggle for control over a country divided by a bitterly disputed presidential election. (AP Photo/Sergei Grits)

Workers installing constructions around a stage are seen through a semi-transparent giant poster of Ukrainian Prime Minister Viktor Yanukovych, the official winner of Ukraine's presidential election, on central square in Donetsk, an industrial city in eastern Ukraine, Monday, Nov. 29, 2004. The legislature in Ukraine's eastern Donetsk region voted Sunday to hold a referendum on autonomy for the province, raising the stakes in a struggle for control over a country divided by a bitterly disputed presidential election. (AP Photo/Sergei Grits)

Ukrainian opposition leader Viktor Yushchenko, right, shakes hands with Russian parliament speaker Boris Gryzlov, unseen, as his opponent, Prime Minister and Pro-Moscow presidential candidate Viktor Yanukovych, left, stands near in Kiev, Ukraine, Friday, Nov. 26, 2004. President Leonid Kuchma met with high-level European envoys Friday while thousands of opposition supporters surrounded and barricaded government buildings as they intensified protests against the outcome of disputed presidential elections. (AP Photo/Ivan Sekretarev)