WASHINGTON (AP) — The National Transportation Safety Board said Tuesday it is sending a team of investigators to Afghanistan to assist local authorities with their investigation of a U.S. cargo airline crash that killed all seven crew members on board.

The plane, a Boeing 747-400 operated by National Air Cargo, crashed Monday just after takeoff from Bagram Air Base. The crew members were all American citizens, the board said. The accident site is within the perimeter of Bagram Air Base.