TAIYUAN -- Mass vomiting and diarrhea cases were reported at Yucai Primary School in Xiaodian district of Taiyuan, capital of North China's Shanxi province, on Wednesday morning, with initial tests confirming norovirus infection, according to local education authorities.

An official from the district education bureau said that over 100 students have taken leave, and efforts are underway to confirm the exact number of cases. Classes at the affected campus have been suspended, with teachers providing online instruction to ensure uninterrupted learning for other students.

Health authorities have launched disinfection protocols and epidemiological investigations, while the cause of the outbreak remains under investigation.