A protester aims a rifle towards riot police as protesters advance to new positions advance to 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. 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

A protester aims a rifle towards riot police as protesters advance to new positions advance to 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. 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

An anti-government protester shows empty bullet casings used by riot police against demonstrators in central Kiev on February 20, 2014. 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. AFP PHOTO/ SERGEI SUPINSKY

An anti-government protester holds a firearm as he mans a barricade on the outskirts of Independence Square in 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/ Marko Drobnjakovic), APTOPIX

This picture grabbed on AFP TV images shows governmental soldiers firing onto demonstrators in Kiev on February 20, 2014. Ukraine's brittle truce shattered on Thursday in fierce clashes between baton-wielding protesters and riot police that claimed at least 27 lives just as EU envoys were holding crisis talks with the embattled president. Bodies of anti-government demonstrators lay amid smouldering debris after masked protesters hurling Molotov cocktails and stones forced gun-toting police from Kiev's iconic Independence Square -- the epicentre of the ex-Soviet country's three-month-old crisis. AFP PHOTO / DAMIEN SIMONART

This picture grabbed on AFP TV images shows governmental soldiers firing onto demonstrators in Kiev on February 20, 2014. Ukraine's brittle truce shattered on Thursday in fierce clashes between baton-wielding protesters and riot police that claimed at least 27 lives just as EU envoys were holding crisis talks with the embattled president. Bodies of anti-government demonstrators lay amid smouldering debris after masked protesters hurling Molotov cocktails and stones forced gun-toting police from Kiev's iconic Independence Square -- the epicentre of the ex-Soviet country's three-month-old crisis. AFP PHOTO / DAMIEN SIMONART

Ukraine, Kiev, 20 February 2014 Riots on Euromaid Square. 67 civilians were killed to this day. Ukraine, Kiev, 20 f??vrier 2014 Emeutes sur le Place Euromaid. 67 civiles ont ??t?? tu??s ce jour. Eric Bouvet / VU Distribution

Anti-government protesters clash with police in Kiev on February 18, 2014. Police on Tuesday fired rubber bullets at stone-throwing protesters as they demonstrated close to Ukraine's parliament in Kiev, an AFP reporter at the scene said. Police also responded with smoke bombs after protesters hurled paving stones at them as they sought to get closer to the heavily-fortified parliament building. AFP PHOTO/ ANATOLII STEPANOV

TOPSHOTS Anti-government protesters clash with police in Kiev on February 18, 2014. Police on Tuesday fired rubber bullets at stone-throwing protesters as they demonstrated close to Ukraine's parliament in Kiev, an AFP reporter at the scene said. Police also responded with smoke bombs after protesters hurled paving stones at them as they sought to get closer to the heavily-fortified parliament building. AFP PHOTO/ ANATOLII STEPANOV