In a still publicly unacknowledged incident, a Russian military surveillance aircraft flew close to four NATO warships in the Baltic Sea on Thursday, including the destroyer USS Jason Dunham, which captured video of the incident, a U.S. Defense Department official said Saturday….

At one point, the Russian aircraft flew above the deck of one of the NATO ships at an altitude of just 500 feet.

“We are not calling this safe and professional. We are calling it routine, but we are on the edge of being very uncomfortable,” the official said.

Image: NATO ships participating in BALTOPS, June 8, 2015 (photo: Luron Wright/UK Ministry of Defense)