Moscow:Russia reserves the right to retaliate for nuclear attacks, according to a decree on the fundamentals of Russia's state policy of nuclear deterrence, which was signed by President Vladimir Putin.
"The Russian Federation reserves the right to launch a nuclear strike either in response to a similar attack or in the event of a threat to the existence of the state," the decree reads on Tuesday.
It says Russia's policy is defensive and is aimed at maintaining its capabilities at a level sufficient to ensure nuclear deterrence, guarantee the protection of its sovereignty and territorial integrity and prevent aggression against the country or its allies.