Ukrainian government forces and pro-Russian separatists said they would not carry out an agreement to pull back heavy guns in east Ukraine on Tuesday, pushing a shaky peace deal closer to collapse.
Ukraine, Rebels Continue Fight for Debaltseve - Feb. 17, 2015

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Cannons of the Ukrainian armed forces are seen at their positions near Debaltseve, eastern Ukraine, Feb. 17, 2015.

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Ukrainian artillery is at a position outside of the village of Luhanske, some 20 kilometers (14 miles) north of Debaltseve, Ukraine, Tuesday, Feb. 17, 2015.

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Members of the Ukrainian armed forces ride on a military vehicle near Debaltseve, eastern Ukraine, Feb. 17, 2015.

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Crosses marked only with numbers stand on the graves of unknown pro-Russian separatists at a cemetery in Donetsk, eastern Ukraine, Feb. 16, 2015.