SAN LUIS OBISPO, Calif. (AP) - A three-day-old wildfire that tore through nearly 8 square miles of Central California wilderness was nearly surrounded on Tuesday, fire officials said.

The blaze that began Sunday was 95 percent contained and should be entirely surrounded by evening, said Kern County fire spokesman Sean Collins.

The 5,196-acre blaze had little movement overnight. About 150 firefighters were on the scene, down from about 600 at the fire's peak.

No one has been hurt, but a 19th century Kern County cattle branding camp and another outbuilding were destroyed.

The cause of the blaze had not been determined.

The fire began in the McDonald-Anticline Oil Field and quickly moved west into the San Luis Obispo County's Temblor Range, some 20 miles southwest of Lost Hills.

After crackling through dense, 5-foot stands of grass in the San Joaquin Valley, the fire moved into the rugged hills and mountain areas east of San L uis Obispo. Vegetation has grown dramatically in recent months because of heavy winter and spring rain.

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Copyright 2011 The Associated Press.