The submarine was spotted near the Kuril islands early on Saturday as Russia was conducting naval exercises with its Pacific Fleet and it was ordered to surface immediately, the Russian ministry was quoted as saying.
It said the order was ignored by the U.S. submarine’s crew, leading the crew of Russia’s Marshal Shaposhnikov frigate to use unspecified “corresponding means” to make the vessel leave.
“The U.S. submarine … left Russian territorial waters at maximum speed,” the defence ministry was quoted as saying.
There was no immediate comment from the United States.
Russia’s defence minister spoke by phone with his U.S. counterpart on Saturday as the United States and other Western nations warned that war in Ukraine could ignite at any moment. U.S. President Joe Biden and his Russian counterpart Vladimir Putin started a call later in the day.