An explosion was reported at a commercial building in La Habra at around 9:46 a.m., resulting in multiple injuries.
Los Angeles County Fire Department inspector Scott Miller says a total of 11 patients had varying degrees of injuries ranging from burns to smoke inhalation. Two patients have critical injuries.
Hazardous material has been ruled out as a cause of the fire, according to Miller. Miller told KPCC that the building was used by a company that polishes wheels.
Around 50 to 60 firefighters were on scene, according to Miller.
"We are currently in the overhaul stage of this fire. We are making sure that we get all the smolder materials out of the fire and making sure that we don't have any possibilities for reignition," said Miller.
Employees that were in the exposed building are still under evaluation, according to Miller.
All 11 patients were taken to various local hospitals depending on the type of injuries they sustained. Others were transported to local, and medical trauma centers.
The Los Angeles County Fire Department was unable to find the source of what ignited the fire.