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FRISCO -- Two students and a teacher were injured Monday when a science experiment caught fire at a Frisco middle school.

Firefighters say a class at Roach Middle School was conducting an experiment burning salts involving strontium chloride, methyl alcohol, and a lighter when a small flash fire occurred around 3:30 p.m.

The teacher discharged the classroom's fire extinguisher, and firefighters said by the time they arrived, the fire was out.

A female student was taken by air ambulance to Parkland Memorial Hospital in Dallas, while the other student and teacher were treated for minor injuries at the scene.

Parkland released the injured student after she was treated for 1st and 2nd-degree burns.

The school was evacuated after the fire.

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