The United Parcel Service and FedEx announced on Friday the immediate grounding of its MD-11 planes, a move that comes just days after a deadly crash involving one of the jets in Kentucky.

At least 14 people were killed after a McDonnell Douglas MD-11 cargo plane belonging to UPS crashed shortly after takeoff in Louisville on Tuesday, leaving multiple nearby businesses on fire and victims scrambling to escape the large blaze. Nine people are still missing, but officials have cast doubt on the possibility of any more survivors.