'This is escalation...we will react accordingly': Putin's foreign minister's chilling warning to West after Ukraine fired U.S.-made missiles into Russia --Starmer hints Kiev CAN use British rockets and ex-Kremlin PM says 'that means WWIII' | 20 Nov 2024 | Russia has signalled it will retaliate with full-scale nuclear war after Ukraine launched U.S.-made missiles over the border on Tuesday. Vladimir Putin's foreign minister Sergei Lavrov chillingly warned that Moscow would "react accordingly" as he described the strike as a signal Kiev "wanted to escalate." The terrifying sabre-rattling was confirmed by the Russian President's close ally Dmitry Medvedev. Posting on X, the Deputy Chair of Russia's security council said it meant "World War III." In a dramatic escalation on the 1,000th day of the conflict, Kiev launched six "ATACM" missiles from an undisclosed location over the border into Russian territory. At the same time, Putin signed off changes to the country's laws on nuclear weapons to make it easier for them to be deployed against Ukraine in retaliation. The amendments allow Russia to launch a nuclear attack in response to a conventional weapons strike -- such as one by long-range missiles. It comes as Sir Keir Starmer offered his biggest hint yet that No.10 would authorise Ukraine to fire UK Storm Shadow missiles into Russia.