Operations are back to normal at the Carolina Prison in Mpumalanga after it caught fire at the weekend, the correctional services department said yesterday.
"The routine is back to normal again," spokesperson Moses Nkabinde said.
"So far nothing has threatened the safety of the inmates and prison officials.
"The lives of about 90 inmates have been saved."
The prison's kitchen caught fire shortly before midnight on Friday.
The cause of the fire was still unknown.
Officials on duty that night heard an "unfamiliar sound" coming from the side of the kitchen and hurried to see what had caused the sound.
When they got there, they found that a fire had started in the kitchen and they sounded the alarm.
Prison warders and police extinguished the fire.
The cost of the damage caused has not yet been assessed.
The preparation of prisoners' food had not been interrupted as arrangements have been made with a neighbouring prison in Belfast.
Nkabinde reassured local residents that their relatives and friends were in safe custody, under the supervision of "courageous and reliable" officials. - Sapa