More than three tons of zinc burned Monday at a chemical plant in northeastern France, local media report.

Shortly after 11:30 p.m., fire broke out in Beaucourt at the Sodex Humbert plant, specializing in zinc-based surface treatment. Firefighters used dry powder extinguishers to extinguish the fire within half an hour.

Zinc is a flammable powder. Hazardous fumes are produced if water or foam is used to extinguish a zinc fire.

Production resumed at the plant Tuesday. The cause of the fire is under investigation.