A Russian spy ship is sitting 30 miles off of the Connecticut coast, according to a Thursday CNN report.
A U.S. defense official told CNN that this is the farthest north the Leonov spy ship - which has high level spying equipment designed to intercept intelligence - has ever traveled.
The ship has made similar patrols in 2014 and 2015, but usually only travels up as far as Virginia.
The official said the U.S. Navy is "keeping a close eye on it."
The U.S. border extends 12 miles offshore, so the Russian vessel is in international waters.
"At this point there's not a violation of international waters. Unless that happens you aren't going to see any aggressive pushback, but it's something that has us on high alert," U.S. Rep. Joe Courtney, D-2nd District, told The Courant.
The ship is moving up the east coast of the U.S. On Tuesday, the ship was spotted 70 miles off Delaware.
Another Russian spy ship trailed the USS Porter, which had three encounters with Russian aircraft Friday.
One plane came unusually close to the Porter and the Pentagon called the situation "unsafe and unprofessional," but the Russian Defense Ministry denied the allegations.
According to CNN, The Navy stated the aircraft was carrying out a "mock attack" on the Porter.