U.S. Transportation Secretary Sean Duffy on Tuesday said the agency will make permanent restrictions to prevent helicopters from flying near Washington Reagan National Airport when two lesser-used runways are operational,

WASHINGTON (AP) — 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 recommended a ban on some helicopter flights Tuesday to improve safety, saying the current setup “poses an intolerable risk.”

The National Transportation Safety Board plans to issue a preliminary report on Tuesday into the Jan. 29 collision between a helicopter and an American Airlines jet that killed 67 people near Washington Reagan National Airport.