Four Colorado Students Suspended Over Pepper Spray Prank

03/22/2012 12:10 pm ET

NIWOT, Colo. -- Four students at Niwot High School in Colorado have been suspended after pepper spray forced a school evacuation.

Four adults and 45 students were treated by paramedics for respiratory problems and skin irritation after the pepper spray got into a ventilation system.

Mountain View firefighters decontaminated the building before students returned inside.

Niwot is between Boulder and Longmont.

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