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.

According to KMGH-TV (, the suspended students could be charged with criminal use of a noxious substance if they fail to complete a justice program.

Mountain View firefighters decontaminated the building before students returned inside.

Niwot is between Boulder and Longmont.


Information from: KMGH-TV,