Video footage has emerged from the Kgosi Mampuru Prison in Pretoria showing Oscar Pistorius playing football with an ex-mafia boss in prison.

In the video, believed to have been shot by another inmate, Pistorius and Radovan Krejcir are seen at an exercise yard taking turns in a penalty shout-out session.

Pistorius is also seen moving a concrete-weighted pole to make way for Krejcir to shoot.

After the video was published online by South Africa's Daily Sun newspaper, critics slammed the department of correctional services questioning why the convicts were not wearing prison clothing.

In response, the department of correctional services told the newspaper that convicts are permitted to wear sporting gear while exercising.

Pistorius has been sentenced to five years for the murder of his girlfriend Reeva Steenkamp.

In response to questions about the upcoming appeal where prosecutors will try and push for Pistorius' conviction to murder, Steenkamp's mother, June, said: "How is it going to help me?"

June Steenkamp is in the process of launching the Reeva Rebecca Steenkamp Foundation aimed at battling domestic violence.

"Teach your daughters to have the confidence to come forward. I knew nothing about Oscar's guns and his way of life," said June Steemkamp.

"It was very strange that they were fighting in a three month relationship."