U.S. Markets open in 8 hrs

Power restored to most San Francisco customers -PG&E

SAN FRANCISCO, April 21 (Reuters) - Fewer that 3,000 customers remained without electricity in San Francisco on Friday after a fire in a utility substation earlier in the day knocked out power for much of the city, according to PG&E .

The fire, which left some 90,000 customers without power for hours, was caused by a failed circuit breaker, said PG&E spokesman Paul Doherty. (Reporting by Noel Randewich; Editing by Sandra Maler)