At least 10 firefighters were injured in the operations, and fire officials closed a freeway off-ramp, the Orange County Register reported Sunday night.

Firefighters responding to the grass fire next to Alstyle Apparel & Active Wear also had to deal with the rupture of one of two 4,000 gallon tanks of hydrogen peroxide.

Fire Marshal Jeff Lutz with the Anaheim Fire Department told the Register firefighters would be "very cautious and safe" as they tried to clean up the spill and "have the business back up and running as soon as possible."

It was not clear whether the firefighters were injured in fighting the grass fire or from exposure to the hydrogen peroxide, the newspaper said. Small patches of fire persisted into the night Sunday.