The military helicopter that collided with a regional jet near Ronald Reagan Washington National Airport, in a crash that killed all 67 people aboard both aircraft, was a UH-60 Black Hawk, considered the “workhorse” of U.

The helicopter involved in the fatal midair collision on Wednesday night may have flown off its approved path, The New York Times reports.

Sixty passengers and four crew members from the plane and three Black Hawk helicopter personnel are feared dead as a recovery mission is underway.