UPDATE: Power restored to over 3,000 PG&E customers in Mariposa County

FRESNO, Calif. (KFSN) -- UPDATE: Power was restored to more than 3,000 PG&E customers in Mariposa County, around 1 hour after they were left in the dark.

Original story follows.

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Thousands of PG&E customers have lost power in Mariposa County.

The outage was reported shortly after 1:00 pm.

The utility company's website showed 3,444 customers without power, including Mariposa, Midpines and the Ponderosa Basin. It wasn't immediately clear what caused the outage.

PG&E says crews were working to assess the outage to restore power. They estimated the electricity would be turned back on for customers by 5:00 pm.