“You know that there is a certain protocol for dealing with foreign ships, surface or underwater, in the event of their intrusion into the territorial waters of Russia,” the Kremlin spokesman said. 

According to Peskov, the military, responsible for protecting the borders and security of Russia, strictly adhere to these protocols.

Earlier, the Russian Ministry of Defense reported that on February 12, a US Virginia-class submarine was discovered in Russian territorial waters near the Kuril Island Urup.

After the discovery of the submarine, her crew was ordered to "surface immediately."

The crew of the ship ignored the request, after which the Russian frigate used special means, and the submarine left the territorial waters of Russia at maximum speed.

Subsequently, the Russian Ministry of Defense called the US military attache.

He was handed a note in connection with the corresponding actions of the American submarine.