Russia has strongly condemned the U.S. seizure of an oil tanker. It heralds a new chill in relations between Moscow and Washington that could spread to other areas and affect President Donald Trump’s efforts to persuade Russia to end its nearly four-year war in Ukraine.

Even at the height of their Cold War nuclear rivalry, the United States and the Soviet Union thrashed out a series of treaties to keep the arms race from spiralling out of control.

Russia’s foreign minister Sergey Lavrov has rejected claims that outside powers can weaken Moscow–Tehran relations, stressing they serve core national and public interests. Lavrov said Russia–U.S. contacts on Ukraine rest on a strong foundation established during the Alaska summit,

The U.S. military’s seizure of a Russian-flagged oil tanker in the North Atlantic is ratcheting up tensions between Washington and Moscow as President Trump seeks to take control of Venezuela, in

The death of the last treaty between Russia and the U.S. that limited the size of nuclear arsenals may spark a new arms race, says a former security council director.

United States forces boarded and seized a Russian-flagged oil tanker in the Atlantic Ocean Wednesday following a weeks-long chase on the high seas which has escalated tensions with Moscow and piled further pressure on its ally Venezuela.

After the New START treaty expires in February, there will be no cap on the number of US and Russian nuclear weapons - but some are sceptical about whether the deal actually made the world safer

U.S. President Donald Trump indicated he would allow the last U.S.-Russia strategic arms control treaty to expire without accepting an offer from Moscow to voluntarily extend its caps on deployments of the world's most powerful nuclear weapons,

Russia and China allegedly expanding Arctic presence for military reasons, conducting joint patrols near Alaska and Canada, top NATO commander warns.