An American Airlines flight operated by PSA Airlines was involved in a midair collision with a military helicopter on Wednesday night near Washington, D.C.

American Airlines CEO Robert Isom shared a letter to all employees sharing updates and resources following the deadly mid-air collision.

The number of people onboard and any fatalities is unknown at this time. The plane can carry up to 65 passengers and four crew members.

A family with Georgia ties is grieving after learning their loved one was one of the pilots killed in the crash between a small American Airlines plane and a military helicopter crash near Reagan National Airport.

D.C. police confirmed a crash had taken place over the Potomac and that search and rescue operations were taking place in the river. Donald Trump later weighed in.

“A PSA Airlines Bombardier CRJ700 regional jet collided in midair with a Sikorsky H-60 helicopter while on approach to Runway 33 at Reagan Washington National Airport around 9 p.m. local time,” the Federal Aviation Administration (FAA) said in a statement.

Both the captain, Jonathan J. Campos, 34, and co-pilot, Sam Lilley, 28, had been flying for years, according to family and friends.

PSA Airlines, a regional airline and subsidiary of American Airlines Group, announced today that it will relocate its corporate headquarters from Dayton, Ohio, to Charlotte, North Carolina, by026.

American Airlines Group Inc. (NASDAQ: AAL) owns PSA, which already has a large presence in Charlotte, operating regional flights on American’s behalf. American is based in Fort Worth, Texas, but runs its second-largest hub at Charlotte Douglas, known as CLT.

Wednesday night’s crash of an American Airlines commuter plane in Washington could be one of the worst disasters for the Fort Worth-based airline in more than two decades.

A flight crew from Charlotte was onboard a plane that collided with a military Black Hawk helicopter over the Potomac River by Washington, D.C., according to multiple media reports and at least one crew member’s family.. A total of 67 people died — 60 passengers, four crew members on the commercial plane and three people on the military chopper.