A commercial plane with 60 passengers and four crew members on board collided with a military helicopter with a crew of three near Washington, D.C., on Wednesday night.

Recovery operations are underway after an American Airlines flight and an Army helicopter collided and crashed into the Potomac River near Ronald Reagan Washington National Airport on Wednesday night.

Investigators have recovered the flight recorders—also known as black boxes—from both the commercial jet and the military helicopter involved in the mid-air collision near Reagan National Airport in Washington,