Six people were dead and seven others injured when a bus was rear-ended by a tractor-trailer Friday night on an expressway in south China's Guangxi Zhuang Autonomous Region, police said.

The bus was under repair on the parking lane of Yizhou-Liuzhou expressway at around 9 p.m. when the accident happened, said traffic police with Liuzhou municipal public security bureau.

Five people died at the scene and another one died in hospital after treatment failed. The bus driver was among the injured, police said.

Police are investigating the incident.