A veteran demonstrates martial arts in front of participants of an "Anti-Maidan" rally to protest against the 2014 Kiev uprising, which ousted President Viktor Yanukovich, in St.Petersburg February 21, 2015. Thousands of Russians marched on Saturday, carrying banners and signs disavowing the protests at Kiev's Independence Square, or Maidan, last year that ousted a Russian-backed president and created a rift between Ukraine and the West and Russia. REUTERS/Maxim Zmeyev





People buy goods at a shop of the "Russia" collective farm in the settlement of Grigoropolisskaya, northwest of the southern city of Stavropol, February 17, 2015. Officials in both Russia and Ukraine are considering tougher trade protections to keep food prices from spiralling as their currencies collapse, with Moscow taking more aggressive steps than Kiev to control exports. Picture taken February 17, 2015. REUTERS/Eduard Korniyenko








A Russia-backed rebel breaks the windshield of a vehicle with his weapon in Debaltseve, Ukraine, Friday, Feb. 20, 2015. After weeks of relentless fighting, the embattled Ukrainian rail hub of Debaltseve fell Wednesday to Russia-backed separatists, who hoisted a flag in triumph over the town. The Ukrainian president confirmed that he had ordered troops to pull out and the rebels reported taking hundreds of soldiers captive.(AP Photo/Vadim Ghirda)





A resident rides a bicycle passing by an armored vehicle in Debaltseve, Ukraine, Friday, Feb. 20, 2015. After weeks of relentless fighting, the embattled Ukrainian rail hub of Debaltseve fell Wednesday to Russia-backed separatists, who hoisted a flag in triumph over the town. The Ukrainian president confirmed that he had ordered troops to pull out and the rebels reported taking hundreds of soldiers captive.(AP Photo/Vadim Ghirda)





A member of the Ukrainian armed forces welcomes his comrades who fought in Debaltseve, as they sit in a bus while preparing to return home, in Artemivsk, eastern Ukraine, February 24, 2015. Pro-Russia separatists said on Tuesday they began withdrawing heavy weapons from the frontline in east Ukraine under a ceasefire deal, but the Ukrainian military, which says it won't pull back until fighting stops, reported further shelling. REUTERS/Gleb Garanich





Children play on a BM-21 Grad multiple rocket launcher system during the opening of an exhibition displaying military weapons and vehicles seized from pro-Russian separatists during fighting in eastern Ukraine, in central Kiev February 21, 2015. The exhibit shows military weapons which are of Russian origin, according to organizer Ukraine's Presidential Administration. REUTERS/Valentyn Ogirenko





Fighters with the separatist self-proclaimed Donetsk People's Republic army walk over a partially destroyed bridge in the town of Debaltseve February 22, 2015. Pro-Moscow rebels said they would start to withdraw heavy weapons from the front line in eastern Ukraine on Sunday but the government in Kiev said armoured columns had crossed the border from Russia to reinforce the separatists.





A man pulls a cart with International Committee of the Red Cross relief packages past an armoured personnel carrier in the town of Debaltseve February 22, 2015.
Pro-Moscow rebels said they would start to withdraw heavy weapons from the front line in eastern Ukraine on Sunday but the government in Kiev said armoured columns had crossed the border from Russia to reinforce the separatists. REUTERS/Baz Ratner





An emptied cluster munitions container is seen stuck in the ground outside apartment blocks in the town of Yenakiieve February 23, 2015. Kiev accused pro-Russian rebels of opening fire with rockets and artillery at villages in southeastern Ukraine on Monday, all but burying a week-old European-brokered ceasefire deal. REUTERS/Baz Ratner





The bodies of victims covered by Ukrainian national flags are seen at the site of an attack in Kharkiv, February 22, 2015. At least two people were killed and 10 wounded on Sunday when an explosive device was thrown from a car into a crowd attending a peace rally in the northeastern Ukrainian city of Kharkiv, Ukrainian officials said. REUTERS/Stanislav Belousov





A fighter with the separatist self-proclaimed Donetsk People's Republic army looks at a destroyed Ukrainian army tank near the town of Debaltseve February 22, 2015. Pro-Moscow rebels said they would start to withdraw heavy weapons from the front line in eastern Ukraine on Sunday but the government in Kiev said armoured columns had crossed the border from Russia to reinforce the separatists. REUTERS/Baz Ratner





Fighters with the separatist self-proclaimed Donetsk People's Republic army sit on top of mobile artillery units in the town of Debaltseve February 22, 2015. Pro-Moscow rebels said they would start to withdraw heavy weapons from the front line in eastern Ukraine on Sunday but the government in Kiev said armoured columns had crossed the border from Russia to reinforce the separatists.
REUTERS/Baz Ratner





A member of the Ukrainian armed forces smokes as he sits at a military vehicle near Artemivsk, eastern Ukraine, February 23, 2015. Ukraine's military said on Monday two of its soldiers had been killed and 10 wounded in the past 24 hours, signalling that fighting has not stopped to allow a truce deal to be implemented. REUTERS/Gleb Garanich





Military trucks from the Ukrainian armed forces transport tanks on the road near Artemivsk, eastern Ukraine, February 24, 2015. Pro-Russia separatists said on Tuesday they began withdrawing heavy weapons from the frontline in east Ukraine under a ceasefire deal, but the Ukrainian military, which says it won't pull back until fighting stops, reported further shelling. REUTERS/Gleb Garanich





An armed man stands near a truck of the separatist self-proclaimed Donetsk People's Republic army towing a mobile artillery cannon, as they pull back from Donetsk, February 24, 2015.
REUTERS/Baz Ratner





A driver is reflected in the side mirror of a separatist self-proclaimed Donetsk People's Republic army truck towing a mobile artillery cannon, as they pull back from Donetsk, February 24, 2015.
REUTERS/Baz Ratner





Police and forensic experts work next to the body of a victim covered by a Ukrainian national flag at the site of an attack in Kharkiv, February 22, 2015. At least two people were killed and 10 wounded on Sunday when an explosive device was thrown from a car into a crowd attending a peace rally in the northeastern Ukrainian city of Kharkiv, Ukrainian officials said. REUTERS/Stanislav Belousov





A photo of Russia's President Vladimir Putin is seen on a poster as people attend an "Anti-Maidan" rally to protest against the 2014 Kiev uprising, which ousted President Viktor Yanukovich, in St.Petersburg February 21, 2015. Thousands of Russians marched on Saturday, carrying banners and signs disavowing the protests at Kiev's Independence Square, or Maidan, last year that ousted a Russian-backed president and created a rift between Ukraine and the West and Russia. The writing on the poster reads "I support Putin" REUTERS/Maxim Zmeyev





A military truck transports a destroyed tank near Artemivsk, eastern Ukraine, February 22, 2015. A senior pro-Russian rebel commander said separatist forces were due to begin withdrawing heavy weapons from the front line in east Ukraine on Sunday, a sign rebels may be prepared to halt their advance as part of an internationally brokered peace deal. REUTERS/Gleb Garanich





The body of a victim covered by Ukrainian national flags is seen at the site of an attack in Kharkiv, February 22, 2015. At least two people were killed and 10 wounded on Sunday when an explosive device was thrown from a car into a crowd attending a peace rally in the northeastern Ukrainian city of Kharkiv, Ukrainian officials said. REUTERS/Stanislav Belousov





A policewoman walks near the body of a victim covered by a Ukrainian national flag at the site of an attack in Kharkiv, February 22, 2015. At least two people were killed and 10 wounded on Sunday when an explosive device was thrown from a car into a crowd attending a peace rally in the northeastern Ukrainian city of Kharkiv, Ukrainian officials said. REUTERS/Stanislav Belousov





A boy shows cartridge cases found inside an armoured personnel carrier (APC) during the opening of an exhibition displaying military weapons and vehicles seized from pro-Russian separatists during fighting in eastern Ukraine, in central Kiev February 21, 2015. The exhibit shows military weapons which are of Russian origin, according to organizer Ukraine's Presidential Administration. REUTERS/Valentyn Ogirenko





A boy sits inside an armoured personnel carrier (APC) during the opening of an exhibition displaying military weapons and vehicles seized from pro-Russian separatists during fighting in eastern Ukraine, in central Kiev February 21, 2015. The exhibit shows military weapons which are of Russian origin, according to organizer Ukraine's Presidential Administration. REUTERS/Valentyn Ogirenko





Military trucks from the Ukrainian armed forces transport tanks on the road near Artemivsk, eastern Ukraine, February 24, 2015. Pro-Russia separatists said on Tuesday they began withdrawing heavy weapons from the frontline in east Ukraine under a ceasefire deal, but the Ukrainian military, which says it won't pull back until fighting stops, reported further shelling. REUTERS/Gleb Garanich





Members of the Ukrainian armed forces ride an armoured personnel carrier near Artemivsk, eastern Ukraine, February 22, 2015. A senior pro-Russian rebel commander said separatist forces were due to begin withdrawing heavy weapons from the front line in east Ukraine on Sunday, a sign rebels may be prepared to halt their advance as part of an internationally brokered peace deal. REUTERS/Gleb Garanich





A member of the Ukrainian armed forces smokes as he stands near an armoured personnel carrier near Artemivsk, eastern Ukraine, February 23, 2015. Ukraine's military said on Monday two of its soldiers had been killed and 10 wounded in the past 24 hours, signalling that fighting has not stopped to allow a truce deal to be implemented. REUTERS/Gleb Garanich





A member of Ukrainian military medical unit cries for his four comrades killed near Debaltseve during a ceremony in Artemivsk, eastern Ukraine, Monday, Feb. 23, 2015. Ukraine delayed a promised pullback of heavy weapons from the front line Monday in eastern Ukraine, blaming continuing attacks from separatist rebels. (AP Photo/Evgeniy Maloletka)





A member of the Ukrainian armed forces keeps his weapon at the ready as he looks out of a helicopter while flying above Kharkiv region, February 24, 2015. REUTERS/Valentyn Ogirenko





A member of the Ukrainian armed forces rides an armoured personnel carrier near Artemivsk, eastern Ukraine, February 22, 2015. A senior pro-Russian rebel commander said separatist forces were due to begin withdrawing heavy weapons from the front line in east Ukraine on Sunday, a sign rebels may be prepared to halt their advance as part of an internationally brokered peace deal. REUTERS/Gleb Garanich