On August 24, 1938, an Imperial Japanese Army Air Force flying school Mitsubishi Ka 1 military trainer collided in midair with a Japan Air Transport Fokker Super Universal airliner over the Ōmori district of Tokyo, Japan. Both aircraft were destroyed, killing the crew of both planes – two on the military trainer and three on the airliner. A large number of people on the ground gathered around the burning wreckage to observe what had just happened, but the fuel tank of the plane exploded several minutes later, killing or injuring many.