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South African police fired stun grenades and arrested 31 students in Johannesburg as protests have erupted at universities across the country, disrupting classes and forcing the closure of some campuses, the BBC reported.

Students are protesting in support of free higher education and in opposition to the government's Monday announcement that tuition fees can increase by as much as 8 percent in 2017. A year ago, large-scale student protests were successful in bringing about a temporary freeze on fee increases for 2016.