A total of 381 students from a private school were hospitalized in northeast China, authorities said Thursday.

The students from the No.2 Experimental School in Fuyu, Jilin Province, showed symptoms of vomiting, diarrhea and fever Tuesday night, according to the city government. Medical staff later found that the school's filtered water supply contained excessive bacteria, while samples of the students' vomit tested positive of norovirus.

The school has more than 10,000 students, with about 8,000 boarding on campus. It provides filtered water to the campus via a pipeline. All water has been now turned off within the school.

By 5 p.m. Thursday, 125 students had been discharged from hospital.

Investigation into the cause of the contamination continues.