Britain summoned Russia's ambassador on Friday to clarify reports of a Russian military incursion into Ukraine and a build-up of equipment near the border, the Foreign Office said.
NATO has accused the Kremlin of escalating the conflict in Ukraine, following reports that a small column of Russian armoured vehicles had crossed overnight into an area of Ukraine where pro-Moscow rebels are battling government forces.
The British Foreign Office said in a statement that it had summoned Russian Ambassador Alexander Yakovenko "to clarify reports of Russian military incursion into Ukraine"
See also:
British Journalists Report Russian Military Crossed Ukraine Border