3 children killed in knife attack at primary school 

A 40-year-old man stabbed students and teachers with a fruit knife at an elementary school in central China yesterday, killing three children and injuring six other people before jumping to his death, officials said.
The attack on the first day after summer break injured five other children and one teacher at Dongfang primary school in Yunxi county in Hubei province, they said.
An initial probe suggests Chen held a grudge after his daughter was denied registration into the new semester’s courses for not completing her summer vacation homework, police said.
Two students were hospitalized with serious injuries, said Deng Yunshan, a government official in Chengguan, the township where the school is located.
The assailant jumped to his death from a fourth-floor window after the attack, Deng said.
Yunxi county’s propaganda office identified the man only by his family name, Chen, and said he was a parent.
An investigation into the incident is underway, Deng said. It is not immediately known how Chen managed to enter the campus since security at schools was tightened following a spate of attacks on children in recent years, many perpetrated in schools and kindergartens.
China has suffered a series of attacks on kindergartens and grade schools. The culprits often are identified as mentally ill or as being angry at society.
In March 2010, a man killed eight children outside their elementary school in Fujian Province. Less than two months later, several separate attacks on children were reported across the country.
In the latest case in July, a cook killed a boy and injured two other children with a knife in a rented apartment in Guangdong Province. AP/Xinhua