The California Highway Patrol (CHP) says it happened just before 7 pm near Alta and Manning.
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The victim was later identified as 69-year-old Robert Holguin.
Investigators say a passing car hit Holguin, then drove off.
Someone saw him lying on the ground and called 911.
First responders arrived and tried giving him CPR.
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He died from his injuries.
Deputies haven't released a description of the suspect vehicle at this time.
Anyone with information is asked to call the CHP.