A protestor burns tyres at a front line barricade in the Ukrainian capital Kiev on January 24, 2014. LEHTIKUVA / Antti Aimo-Koivisto *** FINLAND OUT. NO THIRD PARTY SALES. ***

Protestors at a barricade in the Ukrainian capital Kiev on January 24, 2014. LEHTIKUVA / Antti Aimo-Koivisto *** FINLAND OUT. NO THIRD PARTY SALES. ***

Vladimir (L) and Oleksander protest at a barricade in the Ukrainian capital Kiev on January 24, 2014. LEHTIKUVA / Antti Aimo-Koivisto *** FINLAND OUT. NO THIRD PARTY SALES. ***

Protestors wave flags at a front line barricade in the Ukrainian capital Kiev on January 24, 2014. LEHTIKUVA / Antti Aimo-Koivisto *** FINLAND OUT. NO THIRD PARTY SALES. ***

A protestor warms himself at a barricade in the Ukrainian capital Kiev on January 24, 2014. LEHTIKUVA / Antti Aimo-Koivisto *** FINLAND OUT. NO THIRD PARTY SALES. ***

Protestors warm themselves at a barricade in the Ukrainian capital Kiev on January 24, 2014. LEHTIKUVA / Antti Aimo-Koivisto *** FINLAND OUT. NO THIRD PARTY SALES. ***

Protestors burn tyres in the Ukrainian capital Kiev on January 24, 2014. LEHTIKUVA / Antti Aimo-Koivisto *** FINLAND OUT. NO THIRD PARTY SALES. ***

Protestors burn tyres in the Ukrainian capital Kiev on January 24, 2014. LEHTIKUVA / Antti Aimo-Koivisto *** FINLAND OUT. NO THIRD PARTY SALES. ***

Opposition activists build new barricades during a break in clashes between police and opposition in Kiev on January 24, 2014. Ukrainian protesters today expanded their protest camp and barricades in Kiev after crunch talks between the opposition and President Viktor Yanukovych failed to end the country's deepening crisis. AFP PHOTO / VASILY MAXIMOV

Opposition activists stand on barricades during a break in clashes between police and opposition in Kiev on January 24, 2014. Ukrainian protesters today expanded their protest camp and barricades in Kiev after crunch talks between the opposition and President Viktor Yanukovych failed to end the country's deepening crisis. AFP PHOTO / VASILY MAXIMOV

Opposition activists stand by barricades during a break in clashes between police and opposition in Kiev on January 24, 2014. Ukrainian protesters today expanded their protest camp and barricades in Kiev after crunch talks between the opposition and President Viktor Yanukovych failed to end the country's deepening crisis. AFP PHOTO / VASILY MAXIMOV

Opposition activists stand holding shields near barricades during a break in clashes between police and opposition in Kiev on January 24, 2014. Ukrainian protesters today expanded their protest camp and barricades in Kiev after crunch talks between the opposition and President Viktor Yanukovych failed to end the country's deepening crisis. AFP PHOTO / VASILY MAXIMOV

An opposition activist crosses burning tyres during a break in clashes between police and opposition in Kiev on January 24, 2014. Ukrainian protesters today expanded their protest camp and barricades in Kiev after crunch talks between the opposition and President Viktor Yanukovych failed to end the country's deepening crisis. AFP PHOTO / VASILY MAXIMOV

TOPSHOTS An opposition activist crosses burning tyres during a break in clashes between police and opposition in Kiev on January 24, 2014. Ukrainian protesters today expanded their protest camp and barricades in Kiev after crunch talks between the opposition and President Viktor Yanukovych failed to end the country's deepening crisis. AFP PHOTO / VASILY MAXIMOV

Protesters and police face each other at the barricades in Central Kiev, Ukraine on Friday, 24th January, 2014. LEHTIKUVA / Antti Aimo-Koivisto *** FINLAND OUT. NO THIRD PARTY SALES. ***

Flag of Ukraine at the barricades in Central Kiev, Ukraine on Friday, 24th January, 2014. LEHTIKUVA / Antti Aimo-Koivisto *** FINLAND OUT. NO THIRD PARTY SALES. ***

Flag of Pro EU Party at the barricades in Central Kiev, Ukraine on Friday, 24th January, 2014. LEHTIKUVA / Antti Aimo-Koivisto *** FINLAND OUT. NO THIRD PARTY SALES. ***

Riot police officers block a street in front of barricades of protesters at the monument to Viacheslav Chornovil, a prominent politician in Ukraine and a former Soviet political prisoner, in central Kiev, Ukraine, Friday, Jan. 24, 2014. Protesters have seized a government building in the Ukrainian capital while also maintaining the siege of several governors' offices in the country's west, raising the pressure on the government. After meeting with President Viktor Yanukovych on Thursday, opposition leaders told the crowds that he has promised to ensure the release of dozens of protesters detained after clashes with police and stop further detentions. (AP Photo/Efrem Lukatsky)

A protester guards the barricade in front of riot police in Kiev, Ukraine, Friday, Jan. 24, 2014. Protesters have seized a government building in the Ukrainian capital while also maintaining the siege of several governors' offices in the country's west, raising the pressure on the government. After meeting with President Viktor Yanukovych on Thursday, opposition leaders told the crowds that he has promised to ensure the release of dozens of protesters detained after clashes with police and stop further detentions. (AP Photo/Efrem Lukatsky)