Traffic is backed up for several miles on eastbound Highway 24 near the Caldecott Tunnel after a multi-car crash.

At least three cars were involved in the crash, reported about 6 p.m. just west of Wilder Road, according to a California Highway Patrol log.

At least one lane was blocked by the crash, but the lane reopened about 6:15 p.m.

Details on how the crash occurred and any injuries were not immediately available.