Police said three vehicles crashed for unknown reasons.

Castro Valley, CA. – Three pedestrians were struck and injured by vehicle on Sunday evening at an intersection in Castro Valley, according to the California Highway Patrol.
The accident happened at Redwood Road and Marciel Road at around 6:18 p.m.
Police said three vehicles crashed for unknown reasons.
One of the vehicles struck and injured three pedestrians on the roadside before it went approximately 100-150 ft down an embankment.
One of the pedestrians, a juvenile was taken to children's hospital with broken bones and lacerations.
The vehicles were towed away from the accident location.
No further details regarding this collision were provided.
An investigation is underway.