Dozens of people have been killed in China in the past three months in a series of mass attacks using vehicles or knives.

Police say a 21-year-old student went on a stabbing rampage in China's eastern city of Yixing, leaving at least 8 people dead and 17 wounded.

Police in Wuxi said the stabbing suspect was angry over not getting his graduation certificate, failing an exam and his pay. Eight people died in the attack and 17 were injured.