Correctional Services said that “matters are under control” at Johannesburg’s Sun City Prison on Wed.
Two of the cellphones stolen from victims by the notorious tyre gang during an attack on the N14 highway are still in use, police have discovered.
The Erasmia police say they are now working around the clock to locate them and the users.
"We hope that the cellphones will lead us to the thugs," said police spokesman Elias Ribisi. "But it will be difficult because our tracking system can only detect within a certain radius."
Sikhululekile Secondary School Choir members spoke of their 40 minutes of trauma on the N14 highway when a gang robbed them of cellphones, money and jewellery recently.
The choir was on its way to Krugersdorp from Hammanskraal to compete in the Gauteng provincial schools music competitions.
The attack happened on a stretch of road where a gang, using a truck tyre as a decoy, has raped and robbed three women and assaulted several motorists.
Ribisi said a task team to investigate the case was in the pipeline. "We have to make sure that we catch these men because people's lives are in danger."
Ribisi said the police had been patrolling the area since the attacks were reported.
"We think these men live near the highway and can actually see what is going on because during the period we patrol, they are nowhere to be seen - but when we leave they strike."
He said it was not a coincidence that they robbed the bus.
"We think they live nearby because the bus was robbed during the day."
Ribisi said they did not have concrete leads but they were preparing to interview the pupils for more information.
"There is information we did not get because we only spoke to the teachers, but now we are going to speak to the pupils," he said.