Russia and China have staged mock combat drills in the Sea of Japan on Sunday in a show of strengthening ties between the countries. Although the war games were planned in advance, they come just one day after Donald Trump moved two US nuclear submarines closer to Russia following comments from former Russian president,

P resident Donald Trump said on Friday he's ordered two nuclear submarines to move to the "appropriate regions" in response to what he called "highly provocative statements" from the deputy chair of Russia's security council, Dmitry Medvedev.

The US president said he's ordered two nuclear submarines to move closer to Russia, after a social media spat with Russia's ex-president.