US President Donald Trump said that he moved two nuclear submarines into positions after Russian Deputy Chairman of the Security Council of Russia Dmitry Medvedev made provocative statements on social media.

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

President Trump directed two U.S. nuclear submarines to deploy in response to Russian official Dmitry Medvedev's warning that U.S. cities could be targeted.