Ukrainian soldiers have a break after taking part in operation in undisclosed location in Luhansk region, eastern Ukraine. Russia let Ukrainian officials inspect an aid convoy while it was still on Russian soil and agreed that the Red Cross can distribute the goods in Ukraine's rebel-held city of Luhansk. (AP Photo/Sergei Grits)

Kiev - Ukrainian artillery destroyed military vehicles that crossed from Russia into eastern Ukraine late Thursday, the office of President Petro Poroshenko said.

Poroshenko discussed reports of the incursion by armoured personnel carriers from Russia with British Prime Minister David Cameron and said that a “considerable part of this equipment was destroyed overnight by Ukrainian artillery,” it said in a statement.