UPDATE 1-BP Carson, Calif. refinery shuts FCC - sources

(Adds BP no comment, details)

HOUSTON, July 14 (Reuters) - BP Plc (BP.L)(BP.N) shut a 102,500-barrel-per-day gasoline-producing fluidic catalytic cracking unit during the weekend at its 265,000 bpd Los Angeles-area refinery in Carson, California, according to sources familiar with refinery operations.

The shutdown was signaled by a notice of planned flaring the refinery filed Sunday with California pollution regulators.

A BP spokesman declined to discuss operations at the refinery.

The FCC is expected to be shut for a week to 10 days, the sources said.

Los Angeles wholesale gasoline prices climbed as much as 3.25 cents on Tuesday because of rumors about the shutdown, traders said. (Reporting by Erwin Seba; Editing by Walter Bagley)