Russia and the United States have not conducted a nuclear test since 1992 but Russia's Deputy Foreign Minister says his country "does not rule anything out".

Moscow has warned Donald Trump against resuming the testing of nuclear weapons when he takes office, saying it would “not rule anything out” in response to US aggression.

Russia's arms control point man cautioned Donald Trump's incoming administration on Friday that Moscow was considering a whole range of possible steps on nuclear testing due to what it said was Trump's radical position on the issue.

Ministers warned the US that its nuclear arsenal is intended to ‘sober up’ countries on the ‘brink of direct armed conflict’ with Russia

Russia’s point man for arms control cautioned Donald Trump’s incoming administration on Friday against resuming nuclear testing, saying Moscow would keep its own options open amid what he said was Was

One of Vladimir Putin’s ministers warned Donald Trump that Russia would not be “ruling anything out” when it came to nuclear testing once the president-elect is in office. Post-Soviet Russia has not tested their nuclear weapons since 1990 while the US last tested in 1992.

Russia, with 5,580 warheads, and the United States, with 5,044, are by far the world's biggest nuclear powers, holding about 88% of the world's nuclear weapons, according to the Federation of American Scientists. China has about 500 warheads.

Moscow signals potential responses on nuclear testing as it faces a challenging international climate and what it calls an extremely hostile American policy under Trump's administration. Following discussions of a U.