NMMU is offering a R50 000 reward for information on the petrol-bombing of a building on its south campus at the weekend and two earlier cases.
The reward is dependent on the information leading to the successful arrest and prosecution of the perpetrators.
Police are investigating a case of arson after a bag of stones was thrown through the glass door of the procurement building on Saturday night, and two petrol bombs set off inside.
NMMU spokeswoman Zandile Mbabela said: “It is clear that there is a small group of violent individuals wishing to cause wanton destruction.
“We call on anyone with information that could lead to the successful identification and prosecution of arsonists involved in all three cases.”
Mbabela said the university had urgently called on the police to arrest the arsonists.