JOHANNESBURG: South African police fired stun  grenades and arrested one student in clashes at Johannesburg’s  University of the Witwatersrand on Wednesday, as country-wide protests  for free tertiary education entered a third week. Studies and  examinations have been disrupted at several universities and many remain  closed even after President Jacob Zuma on Friday gave in to the  protesting student’s demands not to increase university fees next year. Protests  against tuition increases started at the university, known as “Wits”,  on October 13 and spread to other campuses nationwide. Some students at  Wits are demanding free higher education, as well improved conditions  for contracted university workers. “Most of the students have returned  to the academic programme. We have about 30 students or so who have been marching around campus since this morning,” Wits University spokeswoman Shirona Patel said. Patel  said police had been allowed onto the campus to restrain protesters.