WASHINGTON (AP) — Federal investigators looking into 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, saying the current setup “poses an intolerable risk.”

The National Transportation Safety Board is seeking more flight restrictions on helicopters around Ronald Reagan Washington National Airport.

The agency says the approved helicopter route is too close to the approach to the runway where an American Eagle plane was attempting to land in January.