By Julia Evans and Andrew King
Three high school students were taken to Christchurch Hospital after receiving electric shocks.
Hilmorton High School staff called an ambulance after the trio showed up at the sick bay reporting their injuries.
Principal Ann Brokenshire said although the boys were able to walk, the school is not "mucking around" considering the nature of the incident.
St John sent an ambulance to the school, on Tankerville Rd, at about 12.14pm on Tuesday.