The DA wants a thorough investigation following several fights in different prisons across SA.
A lawyer says prison officials had no right to delete images showing an inmate being assaulted.
Correctional Services plans to double its efforts to prevent future violence at Groenpunt Prison.
Two awaiting trial prisoners were killed during gang fights at the St Albans Prison in Port Elizabeth.
The Correctional Services Department says a post-mortem will determine how a prisoner died.
The Correctional Services Department says journalists must follow procedures.