Waterloo Regional Police were called to a Cambridge high school on Thursday after a fight between two students caused a scare.
Police say they were called to St. Benedict Catholic Secondary School on Saginaw Parkway for a threat one student made to another during a fight.
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After an investigation, police say they determined the threat to be unviable.
One of the students involved in the altercation suffered a serious injury and was transported to hospital. The student was treated and has been released.
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Police continue to investigate the incident and are asking anyone with information to call 519-570-9777 or Crime Stoppers at 1-800-222-8477.