Bloemfontein - A hostage situation at the Mangaung Correctional Centre outside Bloemfontein was confirmed by prison officials on Wednesday.
G4S Africa head Andy Baker said prison management was dealing with the incident, but did not give more detail.
He said contingency measures designed to deal with hostage situations had been put in place.
Earlier, a local radio station reported that four inmates took a female guard hostage on Wednesday morning.
Sapa