Terrified spectators dive for safety as an out-of-control monster truck ploughs into the crowd at a Mexican air show, killing at least eight and hurting 80 others, dozens seriously.
Carlos Gonzalez, spokesman for the Chihuahua state prosecutors' office, said the driver appeared to have lost control of the truck after guiding it over a pile of cars and crushing them during a demonstration at the "Extreme Aeroshow" on Saturday.
Some witnesses said the driver appeared to have hit his head on the interior of the truck as he drove over the old cars, with at least two reporting that they saw his helmet come off before the massive vehicle rammed into the crowd.
"I fell over and when I turned around I saw the tyre very close. It hit me and threw me to the other side," said Jesus Manuel Ibarra, 41, as he was treated for injuries to his arm and hip.
Gonzalez said prosecutors were looking into the possibility of a mechanical failure that left the driver unable to release the accelerator. During the performance, the truck is driven at high speed over smaller cars, leaping into the air as it crushes their roofs.
The event was cancelled after the accident, which happened during the second day of the three-day show on the outskirts of Chihuahua.