The students of the Xiandong Middle School in Lianyuan City started showing symptoms of food poisoning, including diarrhea and vomiting, last night.
According to the municipal government, twenty-seven of them have been hospitalised.
The food poisoning is believed to have been caused by the milk the school gave to the students as a late afternoon snack, state-run Xinhua news agency reported.
Several such cases were reported from different parts of the country in recent weeks with large numbers admitted to hospitals for treatment.