A picture shows on February 7, 2013 a blackboard at the Alapha Secondary School in Bayswater, a village near Limpopo, South Africa. The school, built by parents in 1985, welcomes in its five classrooms students from poor background. Without library, laboratory or running water, teachers and pupils are even determined to improve the last year results, Principal Jonas Ramapuputla said.   AFP PHOTO / MUJAHID SAFODIEN

Pietermaritzburg - A senior prefect at Hoërskool Voortrekker in Pietermaritzburg was expelled after an allegation of assault and extortion at the school's hostel, the Beeld newspaper reported on Saturday.

The parents of a 14-year-old pupil took him out of the school after they realised he was assaulted in a “sadistic” manner.

The teenager had third degree burns on his leg that were never treated for two weeks, the newspaper reported.

Beeld reported that the Grade Eight pupils were beat up by Grade 12 pupils, had to run in the corridors naked, take off their clothes to be filmed and had to drink a mixture of warm water and vinegar before doing exercises.

The pupils also had to beg for money to give it to the seniors. They were also burnt on their legs with a warm iron.

Principal Jan Nel said the incident tainted the school's reputation. The prefect was expelled.

He told the newspaper that an internal investigation was launched and would be conducted by a panel.