An off-road truck plowed into a crowd and scattered "bodies everywhere" moments after sailing off a jump at a California race Saturday, killing eight people and leaving 12 injured, authorities and witnesses said.

The crash came shortly after the start of the 8 p.m. PDT race called the California 200, said San Bernardino County sheriff's spokeswoman Cindy Bachman.

Bachman said eight people died and 12 were injured, several of them seriously. Seven ambulances and 10 emergency aircraft responded to the scene. Most of the injured were airlifted from the area to Loma Linda University Medical Center or St. Mary's Medical Center.

"There was dust everywhere, people screaming, people running," David Conklin, a photographer covering the event for off-road magazines, told The Associated Press.

Conklin said the Prerunner truck was among the first 20 off the line in the race, and had just gone over a jump known as "the rockpile" about two miles into the race.

He said he watched the vehicle sail through the air. Then he turned to watch for other cars when he heard the commotion caused by the crash.