California authorities were still looking early Monday for the driver of a car who fled the scene after causing a wreck that left five people dead.
The victims comprised of four motorcyclists and a passenger in another car.
The crash took place on a two-lane highway in El Centro, Imperial County, just east of San Diego, on Saturday.
A gold Honda Civic tried to pass a group of 12 motorcycles and crossed into the oncoming lane to do so, the California Highway Patrol said.
The Honda passed the motorcycles, but a Dodge Avenger swerving to avoid hitting the Honda struck the motorcycles head-on, said Deeann Goudie, a spokeswoman for the highway patrol.
Four motorcyclists and a passenger in the Dodge died at the scene. Five of the six people injured were in serious condition, Goudie said.