Two vintage World War Two-era planes have collided and crashed at an air show in the US state of Texas.
Footage shows the aircraft striking each other at a low altitude, breaking one of the aircraft in half. A fireball can be seen as it hits the ground.
The planes – one of them a Boeing B-17 Flying Fortress – were taking part in a commemorative air show near Dallas.
It was not immediately clear how many people were in the two aircraft, or if anyone survived.
The Federal Aviation Administration said it will investigate the crash at the Wings Over Dallas Airshow , which describes itself as the US’s premiere WW2 air show.
The three-day event was being held in honour of Veterans Day, which was on Friday, and between 4,000 and 6,000 people were watching the show.
Dallas Mayor Eric Johnson called it a “terrible tragedy”.