Protesters also blocked entrances at the University of Cape Town, which has suspended classes today and tomorrow because of the unrest. Hundreds of students at the University of KwaZulu-Natal marched in the city of Pietermaritzburg.
The students are reacting to a South African government announcement that universities can increase fees by up to 8 percent next year.
The government has also promised to pay about USD 180 million to cover the costs of poor students.