A statement from Ukrainian President Petro Poroshenko's appeared to make glancing reference to the cease-fire's tentativeness, saying said he and Russian President Vladimir Putin discussed steps "for giving the cease-fire a stable character" in a telephone conversation Saturday.
But, it said, both leaders assessed the cease-fire as having been "fulfilled as a whole."
Col. Andriy Lysenko, a spokesman for Ukraine's national security council, told reporters that rebels had fired at Ukrainian forces on 10 occasions after the cease-fire was to take effect, but all the incidents he detailed took place yesterday night.
But Alexander Zakharchenko, the top separatist leader from Donetsk, told the Russian news agency RIA Novosti that the cease-fire had been violated with two rounds of shelling in the town of Amvrosiivka, about 50 kilometers (30 miles) southeast of Donetsk.
"At this time the cease-fire agreement is not being fully observed," he said. He didn't say when the supposed breach was to have occurred.
Lysenko said Ukrainian forces were strictly observing the cease-fire and suggested that Zakharchenko's claim was a provocation.
Earlier today, the mayor's office in Donetsk said there had been no reports of shooting or shelling there although some shelling had been heard late yesterday afternoon. The city council of the second-largest rebel-held city of Luhansk, which had endured intense fighting for weeks, also reported the night was quiet.
