A local militia fighter is seen in a NPS in Debalcevo in Donetsk, Ukraine, on Feb, 21, 2015.
Local militia fighters walk next to a sezied Ukrainian NPS in Uglegorsk, Ukraine, on Feb, 21, 2015.
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. (Gleb Garanich)
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
Russia-backed rebels hold food products while accompanying a bus carrying Ukrainian prisoners of war in Luhansk, Ukraine, Saturday, Feb. 21, 2015. Ukrainian military and separatist representatives exchanged dozens of prisoners under cover of darkness at a remote frontline location Saturday evening, kicking off a process intended to usher in peace to the conflict-ridden east. Ukrainian troops and rebels were exchanged, according to a separatist official overseeing the prisoner swap at a no man's land location near the village of Zholobok, some 20 kilometers (12 miles) west of the rebel-held city Luhansk. (AP Photo/Vadim Ghirda)