Forty-five Soweto school pupils were hospitalised with food poisoning on Friday, said Johannesburg emergency services.
Paramedics and parents were attending to another 15 children also complaining of stomach cramps, fever and dizziness, said emergency services spokesperson Percy Morokane.
A pupil collapsed just after assembly at Slovoville Primary School, in Soweto, at 8.30am, said Morokane.
However, the school head said the children had not been given any meal at the school.
There were a lot of tuck shops nearby, but there was no confirmation that any of these could be the source.
Morokane said the children affected were in grades one to seven. — Sapa