Russian Deputy Foreign Minister Sergei Ryabkov said Moscow is considering taking steps to resume nuclear tests. He made the warning while cautioning President-elect Donald Trump against resuming nuclear testing next year in an interview with the Russian newspaper Kommersant.

Russia's point man for arms control cautioned Donald Trump's incoming administration against resuming nuclear testing, saying Moscow would keep its own options open.

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 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".

After the US and Russia tested a nuclear bomb in the 1990s, Russia signed the Comprehensive Nuclear Test Ban Treaty in 1996 and ratified it in 2000.

Is the world nearing a nuclear showdown? Russia has issued a dire warning to the U.S., raising concerns about the future of the Comprehensive Nuclear Test Ban Treaty. Russian Deputy Foreign Minister Sergei Ryabkov has called U.