The Army said Monday that a helicopter unit was suspending flights to the Pentagon after an incident last week that led to two airliners being directed to abort landings.

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 is pausing helicopter training flights around the Pentagon after a Black Hawk on Thursday forced two commercial airplanes to abort landings at Washington’s Ronald Reagan National Airport, three Army officials confirmed Monday.