ARLINGTON, Jan. 30 -- A commercial jet carrying 60 passengers and four crew members collided with an Army helicopter Wednesday night while attempting to land at Ronald Reagan National Airport near Washington, triggering an extensive search-and-rescue operation in the Potomac River.

Authorities have not yet confirmed casualties or the cause of the crash. In response, all flights at the airport were suspended, while law enforcement helicopters conducted aerial searches for survivors. Rescue boats were also deployed from a location along the George Washington Parkway, just north of the airport.

President Donald Trump stated he had been "fully briefed on this terrible accident," and offered prayers for those on board, saying, "May God bless...