Rescue teams have now identified 55 of the 67 victims from last week's devastating American Airlines crash in the Potomac River, officials announced on Sunday evening. The death toll has risen significantly from the previously reported 42 victims,

The Black Hawk helicopter involved in the fatal collision near Reagan National Airport was reportedly off-course and at a higher altitude than permitted, with understaffed air traffic control during the incident.

An American Airlines regional passenger jet and a U.S. Army Black Hawk helicopter collided midair and crashed into the Potomac River near Reagan Washington National Airport on Wednesday night. Officials have not provided a death toll but said all passengers and crew on both flights were feared dead.