Anti-government demonstrators escort a captured police officer during clashes in Kiev, Ukraine, on February 20, 2014. (Photo by Yevgeny Maloletka/EPA)

Two anti-government protesters stand behind a blood stained shield after violence erupted in the Independence Square in Kiev February 20, 2014. (Photo by Vasily Fedosenko/Reuters)

Anti-government protesters carry shields as they run after violence erupted in the Independence Square in Kiev February 20, 2014. (Photo by David Mdzinarishvili/Reuters)

Anti-government protesters carry the injured during continued clashes with police in Independence square, despite a truce agreed between the Ukrainian president and opposition leaders on February 20, 2014 in Kiev, Ukraine. (Photo by Jeff J. Mitchell/Getty Images)

Anti-government protesters take cover behind shields after violence erupted in the Independence Square in Kiev February 20, 2014. (Photo by David Mdzinarishvili/Reuters)

An anti-government protester takes cover behind an advertising board after violence erupted in the Independence Square in Kiev February 20, 2014. (Photo by David Mdzinarishvili/Reuters)

An anti-government protester holds a Ukranian flag as he advances through burning barricades in Kiev's Independence Square February 20, 2014. (Photo by Yannis Behrakis/Reuters)

An anti-government protester runs trough the rubble after violence erupted in the Independence Square in Kiev February 20, 2014. (Photo by Yannis Behrakis/Reuters)

An anti-government protester shooting fireworks from a homemade gun during clashes with riot police in Kiev's Independence Square, the epicenter of the country's current unrest, Kiev, Ukraine, Wednesday, February 19, 2014. (Photo by Efrem Lukatsky/AP Photo)

A man covers a dead body in Independence Square in Kiev February 20, 2014. (Photo by Vasily Fedosenko/Reuters)

Anti-government protesters carry an injured man on a stretcher after violence erupted in the Independence Square in Kiev February 20, 2014. (Photo by David Mdzinarishvili/Reuters)

Anti-government protesters carry an injured man on a stretcher after violence erupted in the Independence Square in Kiev February 20, 2014. (Photo by David Mdzinarishvili/Reuters)

Anti-government protesters carry a dead body on a stretcher after violence erupted in the Independence Square in Kiev February 20, 2014. (Photo by David Mdzinarishvili/Reuters)

An injured anti-government protester is taken to an ambulance after violence erupted in the Independence Square in Kiev February 20, 2014. (Photo by Konstantin Chernichkin/Reuters)

Anti-government protesters carry an injured man on a stretcher after violence erupted in the Independence Square in Kiev February 20, 2014. (Photo by Konstantin Chernichkin/Reuters)

A woman reacts as anti-government protesters place a dead body on a stretcher after violence erupted in the Independence Square in Kiev February 20, 2014. (Photo by Vasily Fedosenko/Reuters)

Anti-government protesters carry an injured man on a stretcher after clashes with riot police in Independence Square in Kiev February 20, 2014. (Photo by Maks Levin/Reuters)

Anti-government protesters carry an injured man on a stretcher after clashes with riot police in Independence Square in Kiev February 20, 2014. (Photo by Maks Levin/Reuters)

Dead bodies lie on the pavement in Independence Square after clashes with riot police in Kiev February 20, 2014. (Photo by Konstantin Chernichkin/Reuters)

Blood and stretchers are seen on the pavement during clashes with riot police near Independence Square in Kiev February 20, 2014. At least 21 civilians were killed in fresh fighting in Kiev on Thursday, shattering an overnight truce declared by Ukrainian President Viktor Yanukovich, and a presidential statement said dozens of police were also dead or wounded. (Photo by Maks Levin/Reuters)

Anti-government protesters carry an injured man on a stretcher after clashes with riot police in Independence Square in Kiev February 20, 2014. (Photo by Maks Levin/Reuters)

A wounded protester is attended before being rushed to a vehicle following violence in Independence Square in Kiev February 20, 2014. Ukrainian protesters seized back Kiev's Independence Square in fresh clashes with riot police on Thursday that left several injured and possibly two demonstrators dead. (Photo by Konstantin Chernichkin/Reuters)

Protesters with improvised shields rush toward police lines in a sudden attack in Independence Square in Kiev, Ukraine, on February 20, 2014. Antigovernment protesters and riot police officers each used firearms on Thursday morning in renewed fighting over the square that began just after dawn, breaking a truce that had been declared just hours earlier. (Photo by Sergey Ponomarev/The New York Times)

A priest stands in the lobby of the hotel Ukraine near bodies of anti-government protesters killed during clashes with riot police in Kiev February 20, 2014. (Photo by David Mdzinarishvili/Reuters)

A priest blesses a demonstrator killed in fighting around Independence Square as fellow protesters gather around in Kiev, Ukraine, on February 20, 2014. (Photo by Sergey Ponomarev/The New York Times)

Anti-government protesters carry a fellow demonstor who was wounded during clashes with riot police in central Kiev on February 20, 2014. (Photo by Sergei Supinsky/AFP Photo)

A woman clears ashes and debris with other anti-government protesters from a newly-occupied portion of Independence Square on February 20, 2014 in Kiev, Ukraine. (Photo by Brendan Hoffman/Getty Images)

Anti-government protesters carry the injured during continued clashes with police in Independence square, despite a truce agreed between the Ukrainian president and opposition leaders on February 20, 2014 in Kiev, Ukraine. (Photo by Jeff J. Mitchell/Getty Images)

Anti-government protesters talk to policemen who were captured during clashes with riot police in central Kiev on February 20, 2014. (Photo by Louisa Gouliamaki/AFP Photo)

An anti-government protester holds a crucifix as he prays at Independence Square in Kiev, Ukraine, Thursday, February 20, 2014. Ukraine's protest leaders and the president they aim to oust called a truce Wednesday, just hours after the military raised fears of a widespread crackdown with a vow to defeat “terrorists” responsible for seizing weapons and burning down buildings. (Photo by Marko Drobnjakovic/AP Photo)

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, February 20, 2014. (Photo by Efrem Lukatsky/AP Photo)

A protesters shows the face of a victim killed in clashes with police in Kiev's Independence Square, the epicenter of the country's current unrest, Thursday, February 20, 2014. (Photo by Efrem Lukatsky/AP Photo)

An anti-government protester holds a firearm as he mans a barricade on the outskirts of Independence Square in Kiev, Ukraine, Thursday, February 20, 2014. (Photo by Marko Drobnjakovic/AP Photo)

An anti-government protester reacts following clashes with riot police in Independence Square in Kiev February 20, 2014. At least 21 civilians were killed in fresh fighting in Kiev on Thursday, shattering an overnight truce declared by Ukrainian President Viktor Yanukovich, and a presidential statement said dozens of police were also dead or wounded. (Photo by Vasily Fedosenko/Reuters)

Anti-government protesters prepare to advance over a burning barricade in Kiev's Independence Square February 20, 2014. Ukrainian protesters hurling petrol bombs and paving stones drove riot police from the central square in Kiev on Thursday despite a “truce” which embattled Ukrainian President Viktor Yanukovich said he had agreed with opposition leaders. (Photo by Yannis Behrakis/Reuters)

Anti-government protesters take cover behind shields during clashes with riot police in Independence Square in Kiev February 20, 2014. (Photo by Maks Levin/Reuters)

Anti-government protesters carry an injured man on a stretcher in Independence Square in Kiev February 20, 2014. Ukrainian protesters seized back Kiev's Independence Square in fresh clashes with riot police on Thursday that left several injured and possibly two demonstrators dead. (Photo by David Mdzinarishvili/Reuters)

An anti-government protester calls upon his comrades to advance over a burning barricade in Kiev's Independence Square February 20, 2014. (Photo by Yannis Behrakis/Reuters)

An anti-government protester shoots an improvised device during clashes with riot police in the Independence Square in Kiev February 20, 2014. Ukrainian President Viktor Yanukovich accused pro-European opposition leaders on Wednesday of trying to seize power by force after at least 26 people died in the worst violence since the former Soviet republic gained independence. (Photo by Reuters/Stringer)

An injured man struggles to breathe as he is carried on a stretcher by anti-government protesters after clashes with riot police in the Independence Square in Kiev February 20, 2014. (Photo by Yannis Behrakis/Reuters)

Anti-government protesters carry bags filled with stones to build barricades around the Independence Square during clashes with riot police in Kiev February 20, 2014. Fresh fighting broke out in central Kiev on Thursday, shattering a truce declared by Ukrainian President Viktor Yanukovich, as the Russian-backed leader met European ministers demanding he compromise with pro-EU opponents. (Photo by Vasily Fedosenko/Reuters)

Anti-government protesters carry an injured man on a stretcher in Independence Square in Kiev February 20, 2014. Ukrainian anti-government protesters on Thursday seized back control of Kiev's Independence Square, television pictures showed, after fresh clashes broke out there with riot police. (Photo by Vasily Fedosenko/Reuters)

An Orthodox priest holds a cross as a woman reacts next to dead bodies following violence in Independence Square in Kiev February 20, 2014. (Photo by Konstantin Chernichkin/Reuters)

Anti-government protesters prepare Molotov cocktails during clashes with riot police in the Independence Square in Kiev February 20, 2014. (Photo by Vasily Fedosenko/Reuters)

An anti-government protester waves the national flag from the top of a statue during clashes with riot police in the Independence Square in Kiev February 20, 2014. (Photo by Reuters/Stringer)

Dead bodies lay covered on the ground during clashes with riot police in central Kiev on February 20, 2014 in Kiev. At least 25 protesters were killed on February 20 in fresh clashes between thousands of demonstrators and heavily-armed riot police in the heart of Kiev, AFP correspondents at the scene said. The bodies of eight demonstrators were lying outside Kiev's main post office on Independence Square, an AFP reporter said. The bodies of 17 other demonstrators with apparent gunshot wounds were also seen in the vicinity of two hotels on opposite sides of the protest encampment. (Photo by Bulent Kilic/AFP Photo)

An anti-government protester shouts for help (right) for an injured man during clashes with riot police in the Independence Square in Kiev, on February 20, 2014. (Photo by Reuters/Stringer)

An anti-government protester sits near the bodies of two demonstrators killed by a sniper during clashes with the police in the center of Kiev, on February 20, 2014. (Photo by Sergei Supinsky/AFP Photo)

Medics tend to a gravely wounded anti-government protester in the lobby of the Hotel Ukraine, which has been converted to a medical clinic and makeshift morgue, on February 20, 2014. (Photo by Brendan Hoffman/Getty Images)

Two Orthodox priests pray during a mass for the dead, after violence erupted in Independence Square, on February 20, 2014. (Photo by Vasily Fedosenko/Reuters)

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. (Photo by Bulent Kilic/AFP Photo)

A police officer, left, and a protester representative hold talks near the Cabinet of Ministers in Kiev, on February 20, 2014. (Photo by Efrem Lukatsky/AP Photo)