The US president has been exchanging barbs with Russian leader Dmitry Medvedev, who warned of ‘how dangerous’ Russia can be.

United States President Donald Trump has ordered two nuclear submarines to travel closer to Russia, in his latest tit-for-tat with Russian leader Dmitry Medvedev.

On Friday, Trump posted on his platform Truth Social that the submarine movements came in response to the “highly provocative statements” Medvedev, a former Russian president, made this week.

A day earlier, Medvedev had warned that Trump should be mindful of “how dangerous the fabled ‘Dead Hand’ can be”, a reference to Russia’s Cold War-era nuclear weapons system.

“I have ordered two Nuclear Submarines to be positioned in the appropriate regions, just in case these foolish and inflammatory statements are more than just that,” Trump wrote.