Fourteen striking members of the South African Democratic Teachers Union (Sadtu) were arrested after clashing with police outside the Westville Boys High School in Durban yesterday.
Those arrested will appear in court today.
The fracas started when more than 100 Sadtu members picketed outside the semi-private school as part of the union's instruction to disrupt learning in public schools.
Police were summoned after strikers gathered in front of the school gates yesterday morning. They demanded that the pupils be sent home and that the teachers stop teaching.
Police officers arrived at the school in large numbers prompting some of the teachers to become aggressive. But after several hours the police managed to remove them from the school gates by force.
Police spokesman Vincent Mdunge said no one was injured in the incident as police did not use force on the strikers.
"We had to be tough and demanded that they not infringe on the rights of the pupils and teachers. We told them the school was semi-private and insisted that they leave. When they did not budge, our men moved in. At that point they left the scene and the noise settled down."
There were no other disruptions reported in the province as most government schools remained closed. Education authorities in the province yesterday appealed to principals to use their managerial prerogative and, depending on the safety situation, to keep their schools open.
Police, during the course of the week, evacuated pupils from several schools after authorities received bomb threats.