Three teenagers have been arrested in connection with the murder of a Grade 11 learner from Mondeor High school in Gauteng.
The 19-year-old Kulani Mathebula was stabbed to death on his way to school on Wednesday.
Police made a breakthrough in the investigation and arrested a 13-year-old boy from another school in Mondeor.
A spokesperson for Police Kay Makhubela says two 15-year-old boys were arrested on Thursday morning.
The motive for the murder is unknown at this stage.