A Russian spy ship was spotted patrolling off the coast of Delaware on Tuesday morning. The same day it was learned the Kremlin had secretly deployed controversial cruise missiles inside Russia and buzzed a U.S. Navy destroyer, U.S. officials told Fox News.

Fox News reports:

The Russian ship was in international waters, 70 miles off the coast of Delaware and heading north at 10 knots, according to one official. The U.S. territory line is 12 nautical miles.

It was not immediately clear where the ship is headed.

Later Tuesday, a U.S. official confirmed to Fox News that Russia had deployed ground-launched cruise missiles to two locations inside the country in December. The New York Times first reported that the Obama administration had previously seen the missiles — then in a testing phase — as a violation of a 1987 treaty between the U.S. and Russia that banned ground-launched intermediate-range missiles.

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The ship, the SSV-175 Viktor Leonov, last sailed near the U.S. in April 2015, an official said. It was also seen in Havana in January 2015.