According to the police report, when the driver discovered what was happening in the bus on January 23, he gave the three boys a hiding with his belt, Alberton Rekord reported.
The boys were said to be in grades 6 and 7.
The girls reported the alleged rape to their parents, who then reported the matter to the police.
A rape case was later opened with the Eden Park police.
This after three cases of sexual assault continue to be investigated by the Child Protection Unit after accusations of two teens raping young boys in the South Hills area of Johannesburg.
South Hills parents discovered their children were allegedly being sexually assaulted by two teenage boys in a nearby community churchyard after one of the teens was caught assaulting a nine-year-old boy and making an attempt to assault a four-year-old girl in December.
According to parents, the children said the sexual assault had been taking place since the beginning of last year.
The accused, two teenage boys aged 15 and 17, were arrested by Moffatview police on December 4 and released later that day.
Cases are being investigated by the Child Protection Unit as the parties involved are minors.
– Caxton News Service