JOHANNEBSURG - Four warders attached to the Mangaung Correctional Centre in Bloemfontein have been arrested.
They are linked to the killing of 37-year-old inmate Mpho Mkhumbeni.
The deceased had been serving a life sentence for murder since November 2014.
He died on 12 March following an unauthorised raid on his cell.
READ | Correctional Services confirmed recent Mangaung Correction Centre death unnatural
Prison officials said he died of an asthma attack, but a post-mortem revealed that he died of complications caused by pepper spray inhalation and blunt force trauma.
The suspects are aged between 34 and 50.
They are set to appear before the Bloemfontein Magistrate's Court today.