– We believe that everyone should be very, very cautious with nuclear rhetoric, says spokesperson Dmitrij Peskov to reporters on Monday.
Trump ordered last week two submarines, which can be equipped with nuclear weapons, to be moved to "suitable regions". This after Dmitrij Medvedev, vice chairman of the national Russian security council and Russia's former president, made "very provocative statements".
Medvedev commented on Trump's ultimatum to President Vladimir Putin by saying that every ultimatum is "a threat and a step towards war" between Russia and the USA.
It is unclear whether the American nuclear submarines are equipped with nuclear weapons.