2 firefighters injured during explosion at illegal honey butane oil lab in Anaheim

Multiple people were injured, including two firefighters, during a fire and explosion in a commercial building fire in Anaheim Sunday. 

According to officials, the 4-alarm fire sparked around 11:20 a.m. on Knollwood Circle near Woodland Dr. Police believe the building was used as an illegal honey butane oil lab.

"It looks like they were doing some sort of honey extraction -- making hash oil (and) doing a chemical process with marijuana," said Sgt. Steve Pena of the Anaheim Police Department.

One of the firefighters suffered second-degree burns to his face. The other firefighter injured his back, when the building exploded the impact caused him to fly backwards, and he landed on his oxygen tank. 

On Monday morning, fire officials said the two firefighters have been released from the hospital and are in stable condition. They will continue to recover at home. 

One suspect was severely burned and another man who was detained suffered minor injuries, officials said.

The two men were inside the building at the time of the fire and investigators believe they were running an illegal butane honey lab.

Firefighters from the Orange County Fire Authority and the Orange and Fullerton fire departments assisted in the effort.

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