Ukrainian government troops and Russia-backed rebels failed Tuesday to start pulling back heavy weaponry from the front line in eastern Ukraine as a deadline passed to do so. Under a cease-fire agreement negotiated by the leaders of Ukraine, Russia, Germany and France last week, the warring sides were to begin
withdrawing heavy weapons from the front line on Tuesday. Both sides indicated Monday, however, that they would begin the pullout only after the other party does so. Ukrainian military spokesman Anatoliy Stelmakh said in televised comments early on Tuesday that the separatists continued to attack their positions overnight and that the pullout hinges on the cease-fire being fully observed.