The new US nuclear posture allows a nuclear strike in response to a conventional attack. President Vladimir Putin said Russia, if attacked with nuclear weapons, would not hesitate to respond in kind.

The warning came during a state of the nation address delivered by the Russian president on Thursday, in which he presented a number of new advanced strategic weapon systems which, he said, would render all anti-missile capabilities that the US currently has powerless. Putin also mentioned the new American nuclear posture, which has relaxed some rules on when the US is prepared to use its nuclear weapons.

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“We are greatly concerned by some parts of the new nuclear posture, which reduces the benchmark for the use of nuclear weapons. Whatever soothing words one may try to use behind closed doors, we can read what was written. And it says that these weapons can be used in response to a conventional attack or even a cyber-threat,” he said.

“Our nuclear doctrine says Russia reserves the right to use nuclear weapons only in response to a nuclear attack or an attack with other weapons of mass destruction against her or her allies, or a conventional attack against us that threatens the very existence of the state.”

“It is my duty to state this: Any use of nuclear weapons against Russia or its allies, be it small-scale, medium-scale or any other scale, will be treated as a nuclear attack on our country. The response will be instant and with all the relevant consequences,” Putin warned.