Five vehicles were involved in a crash along westbound State Route 52 just east of Mast Boulevard.
The collision occurred just before 7 a.m. and according to the California Highway Patrol, vehicles were still blocking one lane as of 7:30 a.m.
Medical personnel have been requested for injuries. Tow trucks were also called for four vehicles needing a tow, CHP officers said.
No other information was available.
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