A fire that has burned more than 75,000 acres in Santa Barbara County over the last week was started in an illegal marijuana growing area operated by a Mexican drug organization, authorities said.

Authorities said they confirmed that the blaze, which is burning out of control, started in a cooking area of the pot farm. They believe those responsible are still in the forest area trying leave the forest by foot.

"The Santa Barbara County Sheriff’s Narcotics Unit has confirmed that the camp at the origin of the fire was an illegal marijuana operation believed to be run by a Mexican national drug organization," according to a statement from the Los Padres National Forest. "The Narcotics Unit has been working in the area within the last month eradicating other nearby marijuana cultivation sites."

The location of those who ran the pot farm isn't known, but forest officials warn "not to approach anyone who looks suspicious but to instead contact the nearest law enforcement agency."

The fire, known as the La Brea fire, is now 25% contained. Vicki Collins, a fire information spokeswoman at Los Padres, said that although the La Brea fire was only 10% contained by Friday night, firefighters successfully charred some lines in front of the fire in the Tepusquet Canyon area, depriving the blaze of new fuel.