THREE separate incidents of violence in school sports matches marred South Africa’s weekend both on and off the field. Two pupils were killed, a parent was beaten with a pipe, and a rugby match was halted, reports Beeld on Monday. In the most serious incident, in the Northern Province, police were called in to break up a two-hour knife fight between pupils. Two pupils were killed and two seriously injured. A police official was also seriously injured after a teacher allegedly stabbed him twice. On the same day in Pretoria, a parent was attacked with a pipe when he poked fun at other parents, while in Mpumalanga, a rugby match was called off in midplay when a fist fight broke out on the field.