MOSCOW, April 26. /TASS/. Russia warns the United States and NATO against taking any actions that undermine its security, Russian Foreign Ministry Spokeswoman Maria Zakharova said.

"We are sending clear and unequivocal signals to the United States and NATO warning them about potentially catastrophic consequences of their policy toward jeopardizing Russia’s security," she said.

"Regrettably, the level of nuclear risks have risen dramatically as a result of the West’s destructive policy, which is fraught with a direct military confrontation between nuclear powers," she said, adding that Russia never stops efforts to ensure nuclear deterrence.

"Apart from that, Russia regularly reviews its doctrines to assess their relevance to the current threats," Zakharova noted. "Thus, the reliability and effectiveness of nuclear deterrence in Russia are ensured at a proper level and should not be doubted."