CHANGSHA - More than 100 students at a school in central China's Hunan Province have shown signs of illness and been hospitalized since June 9, local authorities said Friday.

The provincial disease control and prevention center said Friday that 104 students at a school in Xinpu Village, Shimen Township, have experienced continuous fevers, coughing and headaches since June 9.

Liu Fuqiang, a professor with the center, said 42 students in stable condition are still under observation at local hospitals.

Liu said an enteric virus caused the illnesses, and virus samples have been sent to the Chinese Center for Disease Control and Prevention for further analysis.