A pilot's theory about the cause of the crash between an American Airlines jet and a military helicopter has quickly gone viral online.

The US president says the army Black Hawk involved in Wednesday's collision was above the 200ft altitude limit for helicopters.

The Federal Aviation Authority has confirmed US Army Blackhawk helicopter and an American Airlines passenger plane were involved in a mid-air collision.

Officials are turning their focus to recovery from rescue. Here's what to know There are not believed to be any survivors from the midair collision of an American Airlines passenger jet and a US Army Black Hawk helicopter,

Washington, DC Mayor Muriel Bowser has confirmed that “both aircraft are in the water” and 64 people were flying in the American Airlines aircraft and three were aboard the military helicopter that collided mid-air.

A regional jet approach ing Reagan National Airport collided with a military helicopter over the Potomac River late Wednesday night, prompting a massive search and rescue operation.

There are no expected survivors after an American Airlines passenger jet and a U.S. Army Black Hawk helicopter collided in mid-air in D.C.

An American Airlines regional passenger jet and a US Army Black Hawk helicopter crashed into the Potomac River, near the Reagan Washington National Airport on Wednesday night, officials said. The aircraft was,

An American Airlines jet collided midair with a military helicopter near Reagan National Airport. Four crew and 60 passengers were on board the plane.

Emergency crews who waded through the frigid waters of the Potomac River through the night are now shifting to a recovery operation after an American Airlines plane carrying 64 people collided with an Army Black Hawk helicopter near Washington, D.C. ’s Ronald Reagan National Airport.

All 67 people on both aircraft have been declared dead, and emergency responders have so far recovered 40 of the bodies.

The National Transportation Safety Board will hold a briefing on its investigation into the crash between an American Airlines plane and a U.S. Army Blackhawk helicopter. You can watch live below (Scheduled to start at 1:00 p.