U.S. authorities said on Thursday it was not yet clear why a regional jet and a U.S. Army helicopter collided at a Washington airport, killing 67 people in the deadliest U.S. air disaster in more than 20 years.

Flights in and out of the Virginia airport originally halted as dive teams scoured the crash site throughout the night.

There is at least one casualty after a helicopter is believed to have crashed with a plane above a major airport tonight. All runways have been shutdown and all departures and landings have been halted at the DCA Ronald Reagan Washington National Airport,

Several members of the figure skating community have spoken out after several athletes and their families were involved in a plane crash

A passenger jet has collided with a helicopter while landing at Ronald Reagan National Airport near Washington.

Air crash investigations can take months, and federal investigators told reporters they would not speculate on what caused the collision between the Army helicopter and a jetliner.

The harrowing 30 seconds before a Black Hawk helicopter and American Airlines plane crashed in Washington DC was captured on radar. Both aircraft collided near Ronald Reagan National Airport before crashing into the Potomac River at 8.47pm local time (1.47am GMT) on Wednesday.

Divers are expected to return to the Potomac River as part of the recovery and investigation after the United States’ deadliest aviation disaster in almost a quarter century.

RICHMOND, Va. ( WWBT /Gray News) - A retired pilot gave a first-hand view of what it’s like to land at Ronald Reagan Washington National Airport. Chuck Smith says he has made that approach and landing hundreds of times in his career. He shared a video showing what it looks like to fly near Washington, D.C., and over the Potomac River.

Investigators have already recovered the cockpit voice recorder and flight data recorder of the American Airlines plane that collided with an Army helicopter near Ronald Reagan National Airport.

At about 9pm local time (02:00 GMT) on Wednesday, an inbound American Airlines aircraft (flight 5342), manufactured by the Canadian firm Bombardier, collided with a Sikorsky Black Hawk army helicopter as it approached the Ronald Reagan airport, located along the Potomac River southwest of Washington, DC.

As American Airlines Flight 5342 descended calmly over the Potomac River, a US army helicopter approached. The outcome was disastrous