The move follows comments by former Russian president Dmitry Medvedev reminding President Donald Trump that Moscow possesses nuclear strike capabilities.

Trump said he has ordered the deployment of two nuclear submarines following what he called "highly provocative statements" from Russia's Dmitry Medvedev

"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 said. US President Donald Trump on Friday said he had ordered two nuclear submarines to be positioned in regions near Russia in response to threats from former Russian president Dmitry Medvedev.