The reason for the surfacing is left unclear.
The North American Aerospace Defense Command and U.S. Northern Command are closely monitoring the submarine.
“We have not received any requests for assistance from the Russian Navy or other mariners in the area. We always stand ready to assist those in distress,” Northern Command spokesman Bill Lewis said.
He also added that the Russian military exercise was taking place in international waters, well outside the U.S. territorial sea.
As we reported earlier, a new radar has been set by the Russian military in the town of Zapolyarny, Northern Russia, close to the border of Norway and Finland.
"The Rezonans-N system is believed to be capable to discover aircraft and low-observable cruise missiles that fly 20 times the speed of sound. According to Ivan Nazarenko, head of military research center Rezonans, groundworks in Zaployarny have started. It is Rezonans that has developed the radar system. The radar complex will be the 5th of its kind installed in the Russian Arctic. From before, the Rezonans-N is in operation in Cape Kanin and Varandey on the Pechora Sea coast", the story says.