Elementary schools in Xinhua county, Hunan province have seen 180 students hospitalised as of Friday, Sina reports.
Pupils began having headaches and stomachaches, and vomiting after suffering an adverse effect to school meals, specifically milk and cookies.
Preliminary investigation suggests that the milk may be the cause of the incident, according to the county government. Both the milk and cookies have been sent to the provincial disease control centre for testing.
168 students have been discharged from hospital, while 12 remain for further observation.
[Image credit: @albertovo]