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,

The National Transportation Safety Board is seeking more flight restrictions on helicopters around Ronald Reagan Washington National Airport. The NTSB's "urgent" recommendations come more than a month after a Jan.

After the NTSB issued two urgent safety recommendations, the secretary of transportation permanently restricted Washington Reagan National Airport airspace to nearly all helicopter traffic. The NTSB's recommendations come after January's deadly midair collision.