1,600 PG&E customers without power in SF

Pacific Gas and Electric crews are working to restore power to 1,600 customers in San Francisco's Richmond District who are still without power from an outage that started earlier Sunday, a spokeswoman said.

The outage near the corner of California and 16th streets started around 9:30 a.m. and affected about 4,600 PG&E customers.

The outage was caused by an equipment failure, according to preliminary investigation, according to Jacqueline Ratto, a PG&E spokeswoman.

"We have been able to restore power to more than 3,000 customers since the start of the incident," Ratto said. It's not yet known when the remaining PG&E customers' power will be restored.