At least three children were killed and 13 injured when a man armed with a machete rushed into a private day care centre in Pingnan county, Guangxi , yesterday and hacked 16 primary school pupils who were having lunch. Police said the attack happened at about 2pm, when the 16 pupils from the nearby Guanying primary school were finishing their lunch break at the day care centre and preparing to go back to class. They said the man broke into the day care centre and hacked 16 children with the heavy duty knife. At least three children were confirmed dead at hospital. Xinhua said the 13 who were injured had been sent to Pingnan County People's Hospital for treatment. Police arrested the suspect at the scene. Photos released by mainland media showed that most pupils suffered head wounds, with blood soaking through their clothes. Internet users claimed the attacker was a patient who had escaped from a nearby psychiatric hospital. Some claimed at least seven children were in critical condition. Pingnan county police and the hospital refused to give more details on the condition of the children or the investigation. The attack reminded the public of a series of deadly attacks on pupils in 2010, including a Fujian man who killed eight children and injured five others outside a primary school in Nanping in March 2010, and a Guangxi man who killed a student and injured three others outside a primary school in Hepu in April 2010. That same month, a Guangdong man injured 15 pupils in a primary school in Leizhou with a knife. A Jiangsu man hacked 28 children in a kindergarten in Taixing , and a Shandong man injured five pupils in Weifang . In May 2010, a Shaanxi man killed seven children and injured another 11 in a kindergarten in Nanzheng township.