More than 50 students in central China's Hunan Province have been hospitalized after having meals at school, local authorities said on Sunday.

Pupils from Jiaquan Hope elementary school in Gutang Township of Lianyuan City had headaches and vomitted after eating at a local school. The students have been sent to a local hospital for treatment.

As of Sunday afternoon, some students received transfusions at the hospital.

Investigation is under way.

Earlier this month, 180 pupils in Hunan became ill after having cookies and milk at school.