Fighting flared Sunday between Ukrainian and pro-Moscow separatist forces, both sides reported, further straining a unilateral cease-fire declared by Ukraine as Russian President Vladimir Putin pressed Kiev to talk to the rebels.
Putin and Ukrainian President Petro Poroshenko, at separate ceremonies marking the anniversary of Nazi Germany's invasion of the Soviet Union, both stressed the need to bring peace to Ukraine's rebellious east.
The seven-day cease-fire came under pressure almost as soon at it began Friday night, with the government accusing the separatists of attacking its military bases and posts on the Russian border. The violence continued for a second night into Sunday.
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