Two World War II-era airplanes collided Saturday at an air show in Dallas, US aviation authorities confirmed.
It was not immediately clear how many people were in the two craft, a Boeing B-17 Flying Fortress and a smaller Bell P-63 Kingcobra, the Federal Aviation Administration said.
But multiple videos posted on social media showed dramatic scenes of the smaller plane descending on the lower-flying B-17 as both appeared to be veering to the left.
After the collision, the planes appear to break up into several large pieces before crashing into the ground and exploding in a ball of fire and a huge plume of black smoke.
The FAA said its agents and the National Transportation Safety Board would investigate the incident.
The B-17, a four-engined bomber, played a major role in winning the air war against Germany in World War II. With a workhorse reputation, it became one of the most produced bombers ever.
The P-63 Kingcobra was a fighter aircraft developed during the same war by Bell Aircraft but used in combat only by the Soviet Air Force.