Kremlin reacts to Trump's nuclear testing remarks

"I want to recall President Putin's statement, which has been repeated many times: if someone departs from the moratorium, Russia will act accordingly," Peskov said.

Post-Soviet Russia has never tested a nuclear weapon. The Soviet Union last tested in 1990, the United States last tested in 1992 and China in 1996.

(Reporting by Dmitry Antonov, editing by Guy Faulconbridge)