The U.S. Federal Aviation Administration is indefinitely restricting helicopter flights near Washington Reagan National Airport after a deadly collision between an American Airlines regional jet and Army Black Hawk killed 67 people.

The FAA will restrict helicopter traffic around Ronald Reagan Washington National Airport. American Eagle Flight 5342 was seconds away from landing at Reagan National Airport when it collided with an Army helicopter on Wednesday night.

The National Transportation Safety Board has interviewed the air-traffic controller who was working at the time of the midair collision, board member Todd Inman said, adding that the interviews have been ongoing throughout the day.

A preliminary safety report from the Federal Aviation Administration reportedly found that air traffic control staffing was abnormally low at Ronald Reagan Washington National Airport on the evening of Wednesday, Jan. 29, according to The New York Times, which obtained a copy of the report.

A midair collision between an Army helicopter and a passenger jet killed all 67 people aboard the two aircraft, officials said, as they search for answers in the nation's deadliest aviation disaster in nearly 25 years.

On a fall afternoon, a Boeing passenger jet had just been cleared for takeoff at Reagan National Airport when the pilot saw a Bell helicopter lift off in a direction that would cross the plane’s path. The airplane pilot aborted the takeoff, overrunning the runway before coming to a stop on a grassy strip just 130 feet from the Potomac River.