Pretoria - Protesting outsourced workers and students on Tuesday morning disrupted the University of South Africa's 5th Research and Innovation Week.
Speakers were supposed to discuss the issue of languages in universities on Tuesday.
Instead, workers and students disrupted the proceeding and Unisa had no choice but to cancel the event.
On Monday, student representative council and vice-chancellors discussed the rise and fall of universities in light of the outsourcing and fee protests.
University spokesman Martin Ramotshela said they were still deciding whether to continue with the event on Wednesday.