WASHINGTON (Reuters) – The U.S. Army is pausing helicopter training flights around the Pentagon pending a review into two passenger airline flights that were forced to abort landings at Reagan Washington National Airport on Thursday because of a nearby Black Hawk helicopter.

The Army’s 12th Aviation Battalion has paused training flights in and around Pentagon while they determine what happened during Thursday’s flight, a U.S. official told Reuters Monday. The battalion had recently begun gradually resuming flights after the Jan. 29 mid-air collision of an Army Black Hawk on a training mission and an American Airlines regional jet near Reagan killed 67 people.

(Reporting by Idrees Ali and David Shepardson)