A dozen lawyers are calling for specific and detailed regulations to protect kindergarten children from unauthorized medicine.

"No rule about medicine in kindergartens exists under current regulations," said Huang Yizhi, a lawyer in Beijing.

Hongji Xincheng and Fengyun kindergartens in Xi'an, Shaanxi province, are accused of having administered antiviral drugs to children since 2008, local authorities said on Thursday. The two kindergartens, which had a combined 1,455 students this school year, were shut down on Friday by the Xi'an government. Five staff members have been detained.