UPDATE 1-Tank burns at Flint Hills' Corpus Christi refinery

(Updates with regulatory filing)

HOUSTON, May 24 (Reuters) - Lightning ignited a fire in a storage tank containing naphtha at Flint Hills Resources 288,126 barrel per day refinery in Corpus Christi, Texas, on Saturday night, according to a notice filed with state pollution regulators.

A Flint Hills representative was not available on Sunday to discuss refinery operations.

A refinery spokesman told KIII-TV in Corpus Christi that refinery production was unaffected by the storage tank fire, according to a report on the station's website.

Firefighters sprayed foam on the tank to extinguish the blaze, according to the notice filed with the Texas Commission on Environmental Quality.

Saturday's blaze was the second fire last week at Flint Hills' Corpus Christi refinery.

A corrosion inhibitor tank caught fire on a gasoline-producing fluidic catalytic cracking unit at the refinery on Tuesday. The FCC was shut for about 24 hours after Tuesday's fire.

Flint Hills Resources, based in Wichita, Kansas, is a subsidiary of privately held Koch Industries Inc. (Reporting by Erwin Seba; Editing by Jan Paschal)