OCOTILLO, Calif. Authorities were looking for the driver of a car that tried to pass a group of motorcycles and caused another car to lose control on a desert highway, triggering a crash that killed five people and injured six others, officials said.

Seven motorcyclists members of a club celebrating its 10th anniversary were ensnared in the collision on two-lane Route 98 near Ocotillo, a few miles north of the Mexico border and 80 miles east of San Diego.