Watch as demonstrating Wits students and private security guards face-off outside the university's Great Hall on Tuesday afternoon.
Students and security officers pelted one another with stones across the plaza in front of the Great Hall. The guards shielded themselves as shouts, whistles and thuds of landing rock rang out.
The outbreak of violence followed a tense Tuesday morning on and around campus. Police apprehended 31 suspects for blocking traffic. The suspects were released later the same day.