Oct 3 (Reuters) - A fire broke out at Chevron's ( CVX ) El

Segundo refinery in Los Angeles county, California Governor

Gavin Newsom's press office said on Thursday on X.

The city's fire department is ready to assist with any

request for aid, Los Angeles mayor Karen Bass said, adding,

"There is no known impact to LAX at this time," referring to the

city's international airport.

The cause of the incident was unclear, the Los Angeles Times

said, while broadcaster CBS said officers and firefighters

rushed to the refinery after reports of an explosion.

Police in El Segundo were not aware of any immediate

injuries or evacuations, it added.

The refinery's rated capacity is 290,000 barrels per day,

and its main products are gasoline, jet and diesel, Chevron ( CVX ) says

on its website. Its total storage capacity is 12.5 million

barrels in about 150 major tanks.