COMPTON - Long Beach and Los Angeles County firefighters knocked out a blaze at a local warehouse early Tuesday.

A driver on the Long Beach (710) Freeway near Victoria Street first spotted smoke billowing from the roof of a warehouse at about 8:45 a.m., said Long Beach Fire Department Spokesman Josh Johnson.

Long Beach Fire Department Truck 11 was first on scene at the warehouse, which sits in the 3100 block of Ana Street in Compton, and found heavy smoke coming from the roof, Johnson said.

Though the area is covered by the Los Angeles County Fire Department, Long Beach launched an aggressive attack and continued to help county firefighters upon their arrival, Johnson said.

Crews cut through extensive duct work on the underside of the roof to stop the fire from spreading, Johnson said.

"The building used to be a textile (manufacturing plant) and was in the process of being renovated to become some type of storage warehouse," Johnson said.

Repair crews were working on the air conditioning when built-up grease inside the duct ignited, he said.

"About 20 people were in the building when the call to 911 was made, and thankfully they all made it out and were not injured," Johnson added.

The extent of the damage had not yet been calculated Tuesday, Johnson said.

tracy.manzer@presstelegram.com, 562-499-1261.