Russian President Vladimir Putin on Sunday warned the United States that if Washington deployed long-range missiles in Germany then Russia would station similar missiles in striking distance of the West.

The United States said on July 10 that it would start deploying long-range missiles, opens new tab in Germany from 2026 in preparation for a longer-term deployment that will include SM-6, Tomahawk cruise missiles and developmental hypersonic weapons.

In a speech to sailors from Russia, China, Algeria and India to mark Russian navy day in the former imperial capital of St Petersburg, Putin warned the United States that it risked triggering a Cold War-style missile crisis with the move.

"The flight time to targets on our territory of such missiles, which in the future may be equipped with nuclear warheads, will be about 10 minutes," Putin said.

"We will take mirror measures to deploy, taking into account the actions of the United States, its satellites in Europe and in other regions of the world."

Putin, who sent his army into Ukraine in 2022, casts the war as part of a historic struggle with the West, which he says humiliated Russia after Soviet Union fell in 1991 by encroaching on what he considers Moscow's sphere of influence.

Ukraine and the West say Putin is engaged in an imperial-style land grab. They have vowed to defeat Russia, which currently controls about 18% of Ukraine, including Crimea, and parts of four regions in eastern Ukraine.

Russia says the lands, once part of the Russian empire, are now again part of Russia and that they will never be given back.