American Federal Aviation Administration says an American Airlines flight has collided mid-air with a helicopter in Washington DC.
According to the Washington DC Fire Department the plane crashed in the Potomac River.
The jet was carrying 60 passengers and four crew members, and three US Army soldiers were on board the military helicopter.
Police divers and boats are searching the water for survivors, while US authorities are investigating.
US President Donald Trump says he has been briefed on the "terrible accident" and thanks emergency responders for their "incredible work.
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