Ukraine has fired U.K.-supplied Storm Shadow missiles into Russia for the first time, British media reported Wednesday, after being given the green light from London. Several missiles were launched against at least one Russian military target, The Financial Times said, citing an unidentified Western official. The Guardian said Britain had given Ukraine permission to use the missiles in Russia in response to Moscow's deployment of North Korean troops on the border. Russia said Tuesday that the missiles had been used to target a military facility in the Bryansk border region. Both Ukraine and Russia are jockeying for upper hand on the battlefield before Trump re-enters the White House in January.