An American Airlines passenger jet and an Army helicopter collided on Jan. 29 as the plane prepared to land at Washington, D.

A U.S. House of Representatives oversight subcommittee said on Thursday it is investigating the collision in January between an Army Black Hawk helicopter and an American Airlines regional jet that killed 67 people near Ronald Reagan Washington National Airport.

The Federal Aviation Administration has imposed permanent restrictions on non-essential helicopter operations around the Washington, D.C., airport where an Army chopper collided with a commercial jet

Federal investigators looking for the cause of the January collision between a passenger jet and an Army helicopter near Washington, D.C., that killed 67 people are recommending a ban on some helicopter flights.

The US Federal Aviation Administration (FAA) has permanently restricted non-essential helicopter operations around Reagan National Airport following a deadly mid-air collision with an American Airlines regional jet in January.

The Federal Aviation Administration said on Friday it is imposing permanent restrictions on non-essential helicopter operations around Washington's Reagan National Airport and eliminating helicopter and passenger jet mixed traffic.

The closure comes after crash investigators said there was a history of safety risks near the busy airport that had gone unaddressed.

The move follows federal investigators's call for a ban on helo flights on the route, citing a string of near misses in recent years.