Power restored to customers in area of SF's Pier 23

File photo: PG&E truck

PG&E officials said power has been restored to all customers in the area of Pier 23 in San Francisco Wednesday night.

As of 8 p.m. power had been restored to 645 customers who lost power about two hours earlier, PG&E spokeswoman Karly Hernandez said. 

The cause of the outage is under investigation.