As many as 60 passengers and four crew members were aboard American Eagle Flight 5342, and the Black Hawk helicopter was carrying three soldiers. There were no survivors.

The crash around 9 p.m. threw one of the world's most tightly controlled airspaces into chaos, 3 miles south of the White House and U.S. Capitol. Officials were probing the cause Friday as they searched the river.

Federal authorities have restricted helicopter flights near Ronald Reagan Washington National Airport. The move comes days after a deadly collision between a passenger jet and a military helicopter.