Los Angeles County fire Inspector Sam Padilla says firefighters have been called to Maple Hill Elementary School in the town of Diamond Bar, east of Los Angeles.
He says it appears a car struck three people outside the school Wednesday. Two were moderately injured, and the other is listed as critical.
Televised news reports showed an adult and two children being treated. One child was to be airlifted to a hospital.
A black sport utility vehicle was up an embankment near a sidewalk.
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