NANNING -- Twenty-one pupils have been injured after debris from a landslide in south China's Rong'an County, Guangxi Zhuang Autonomous Region, hit a primary school on Thursday.

The landslide occurred in Liuliao village of Fushi Township at noon. The landslide caused the collapse of the walls of the school's classrooms, according to local authorities.

All injured pupils have been sent to hospitals in the county. Seven were in serious conditions but their injuries were not life-threatening, the authorities said.