Four workers were injured Wednesday afternoon when a flash fire broke out inside a Dalton manufacturing plant, authorities said.

Firefighters were dispatched to the Plaze facility on Brookhollow Industrial Boulevard about 5 p.m., Dalton city spokesman Bruce Frazier said. The fire was extinguished by the facility’s sprinkler system, but four employees suffered burns in the blaze, he said.

“Early information from the investigation indicates that the fire was caused by an accident while a contractor was working on a catwalk at the facility,” Frazier said. “While working on the catwalk, flammable material at the scene was accidentally ignited. Firefighters believe the fire was a flash ignition of the flammable material.”

One employee was treated at the scene and released while the other three were taken to hospitals for treatment. One patient was taken to Erlanger Hospital in Chattanooga and the other two were taken to Hamilton Medical Center in Dalton, authorities said.

None of their injuries are considered life-threatening.

According to the company’s website, Plaze is a specialty chemical contract packager that specializes in the development of aerosols, liquids and bag-on-valve products.

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