OAKLAND — An illegal marijuana grow was found inside an East Oakland warehouse that caught fire Thursday morning, officials said.

Firefighters who responded to the blaze in the 900 block of 77th Avenue also had to call police to deal with looters at the building who apparently were trying to steal some of the marijuana.

More than 300 plants in various stages of growth and packaged product worth at least $150,000 in total street value were seized, police said. Officers also seized some growing equipment.

The fire was reported about 6:18 a.m. Thursday at the warehouse, which is located in an industrial area near the Oakland Coliseum.

More than 20 firefighters responded.

It was not known if anyone was inside the warehouse when the fire started but there were no reported injuries.

The fire was under control in less than an hour. The cause of the fire is under investigation. A damage figure was not available.

Police said a Discovery Bay man who was in charge of the grow operation showed up at the scene but did not have the necessary paperwork for a legal grow that large. He was not arrested.

Police also said they did not arrest anyone for looting.