"Appropriate actions were undertaken and a part of it no longer exists," Lysenko said.
Ukrainian President Petro Poroshenko briefed British Prime Minister David Cameron on the incident and told him a "significant" part of the Russian column had been destroyed, according to statement from Poroshenko's office. Britain summoned Russia's ambassador to ask him to clarify reports of a military incursion into Ukraine. Earlier Friday, responding to reports that a Russian column had entered Ukraine overnight, NATO Secretary-General Anders Fogh Rasmussen said the alliance had seen what he called a Russian incursion into Ukraine.
"It just confirms the fact that we see a continuous flow of weapons and fighters from Russia into eastern Ukraine and it is a clear demonstration of continued Russian involvement in the destabilization of eastern Ukraine," the Danish NATO chief said. A spokesman for Russia's border guards service was quoted by Russian news agencies as denying that any Russian military units had entered Ukraine.
In a statement issued by the Russian foreign ministry, Moscow accused Ukrainian forces of intensifying the fighting against pro-Moscow separatists in eastern Ukraine in an attempt to sabotage Russian efforts to get aid into rebel-held areas.
After Ukraine reported the firefight, Russia's ruble currency weakened against both the dollar and the euro. Russian shares were also dragged lower.