President Vladimir Putin warned the West on Wednesday that Russia could use nuclear weapons if it was struck with conventional missiles, and that Moscow would consider any assault on it supported by a nuclear power to be a joint attack.

In a strong, new warning to the West, President Vladimir Putin said Wednesday that any nation’s conventional attack on Russia that is supported by a nuclear power will be considered a joint attack on his country.

Russian President Vladimir Putin says that a nuclear power supporting another country’s attack on Russia will be considered a participant in aggression.