The Russian and Chinese navies have practiced hunting and destroying an enemy submarine in the Sea of Japan, Russia's defence ministry said on Wednesday, days after U.S. President Donald Trump said he had moved two U.

Donald Trump ruffled Kremlin feathers last week, when he ordered two US nuclear submarines to move closer to Russia.

Russia has abandoned a long-held nuclear "freeze" after Donald Trump deployed submarines near Vladimir Putin's coasts. Moscow has said it no longer considers itself bound by a self-imposed ban on the deployment of missiles - and is poised to bring short- and intermediate-range nuclear weapons into action.