An American Airlines plane with 60 passengers and four crew members on board collided with a military helicopter near Washington, D.C., on Wednesday night, plunging into the Potomac River.

Rescue crews will return to the Potomac River on Friday morning as they continue searching for victims of Wednesday night’s deadly midair collision.

An American Airlines flight crashed into a U.S. Army Black Hawk Helicopter over the Potomac River as it approached Ronald Reagan Washington National Airport.