Two men were hospitalized on Monday after being burned in a commercial fire in Fort Worth.

The fire began around 5 p.m. on September 12 in a single-story “large commercial structure” in the 2500 block of Northeast 36th Street just east of I-35W, according to local officials.

Fort Worth’s fire department said the fire was “under control” by 7:25 p.m.

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“The business did house chemicals but [firefighters] extinguished [the] fire before they were ignited,” the Fort Worth Fire Department (FWFD) said, noting that environmental crews had responded to the scene and asking nearby residents to avoid the area.

The two victims, both civilians, were taken to Parkland Hospital in Dallas. While the severity of the men’s injuries, which included facial burns, is not clear, they are expected to recover.

One firefighter also sustained a minor injury to his chin.

FWFD told The Dallas Express that while the cause of the fire is still “under investigation,” factors contributing to the ignition include “mechanical failure” and “electrical failure.”