MILL VALLEY (CBS SF) — Authorities in Marin County confirmed Friday there was a power outage caused by an unknown issue affecting customers in Mill Valley.

Mill Valley police tweeted about the outage at around 9:40 a.m., saying that PG&E officials reported the estimated time to restore power was 3 p.m. The cause of the outage is currently unknown.

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The PG&E power outage webpage showed approximately 1,500 customers without electricity from two separate outages in Mill Valley.

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Mill Valley power outage map (PG&E)

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Earlier this week, a power outage affecting more than 6,000 PG&E customers in Marin County was caused by a bird that flew into electrical equipment, according to the utility.