Not the first time they've been poking around
AUG. 4, 2009
Russian Subs Patrolling Off East Coast of U.S.
WASHINGTON — A pair of nuclear-powered Russian attack submarines has been patrolling off the eastern seaboard of the United States in recent days, a rare mission that has raised concerns inside the Pentagon and intelligence agencies about a more assertive stance by the Russian military.
President Obama spoke by telephone with President Dmitri A. Medvedev of Russia on Tuesday, but it was not clear whether the subject of the submarines came up, although another source of friction between the two countries did. Mr. Medvedev called Mr. Obama to wish him a happy birthday and the White House said the president used the opportunity to urge Russia to work through diplomatic channels to resolve rising tensions with Georgia.
https://www.nytimes.com/2009/08/05/world/05patrol.html
Feb. 15, 2017
Russian spy ship patrols 30 miles off the coast of Connecticut
https://www.usatoday.com/story/news/world/2017/02/15/russian-spy-ship-spotted-near-us/97939010/