A B-1 Lancer from Ellsworth Air Force Base in South Dakota crashed Thursday evening during a training mission,  with all four of its crew members ejecting, the Air Force announced.

The bomber crashed at around 5:50 p.m. local time “while attempting to land on the installation,” the 28th Bomb Wing at Ellsworth said in a statement. Four aircrew members were aboard the aircraft for a training mission and ejected safely.

“A board of officers will investigate the accident,” the 28th Bomb Wing said. The Air Force did not provide additional details.