"The Baltic Fleet’s forces escorted the US Navy’s guided missile destroyers gravely and Porter, which have entered the southern part of the Baltic Sea’s waters," the center said, TASS news agency reported.
The Russian Navy’s Boiky and Soobrazitelnyy corvettes are monitoring the US warships’ activity.
On Saturday, Russia’s Black Sea Fleet started monitoring movements of the US guided-missile destroyer USS Donald Cook, which had entered the Black Sea. The Black Sea Fleet guard ship Pytlivy is tracking the US vessel’s movements.