Welkom - Police fired rubber bullets at Goldfields Further Education Training students who stoned them and broke college windows on Wednesday, said Free State police.
They arrested 27 of them for public violence and malicious damage to property, Captain Stephen Thakeng said.
He said college management called the police about an illegal gathering by students, who were breaking windows.
When the police arrived students threw stones and empty bottles at their cars. Police used rubber bullets when they refused to disperse.
Police were monitoring the situation on Wednesday afternoon.
Sapa