Trump also rebuked Medvedev in July, accusing him of throwing around the "N (nuclear) word" after the Russian official criticised U.S. strikes on Iran and said "a number of countries" were ready to supply Iran with nuclear warheads.

President Donald Trump has reportedly hinted that his nuclear submarines are now "in the region of Russia" after he ordered them there following a comment made by former Russian President Dmitry Medvedev.

Dmitry Medvedev said President Trump is "playing the ultimatum game with Russia" in pressuring for an end to the war on Ukraine.

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

Donald Trump slammed Dimitry Medvedev by branding him “the failed former President of Russia, who thinks he’s still President,”

Moscow downplayed President Trump's announcement that he'd ordered two nuclear submarines to "the appropriate regions" after heated Russian rhetoric.

Kremlin spokesperson Dmitry Peskov noted that U.S. submarines "are always on alert," claiming that Russia is not interested in escalating tension between the two nations.

The Kremlin tried Monday to defuse tensions caused by remarks from one of Russia’s top officials that led President Trump to shift two nuclear submarines closer to Moscow. “As you know, Russia holds a responsible position.