Moscow has said it no longer considers itself bound by its self-imposed freeze on the deployment of the missiles.

Russia urged caution on Monday after US President Donald Trump said he would deploy two nuclear submarines following an online row with former Russian president Dmitry Medvedev.

Russian servicemen fire man-portable air-defence systems in the town of Sudzha, recaptured by Russian forces amid Russia's military operation in Ukraine, in Kursk region, Russia, ...