Seven children and two adults were hacked to death with a cleaver in an attack at a kindergarten in northern China yesterday, the latest in a series of violent school assaults.
The incident in Shaanxi province, which ended with the assailant's suicide, was the fifth on young schoolchildren in less than two months and comes despite a push to boost security in and around schools across the country.
Local villager Wu Huanming, 48, used a kitchen cleaver to carry out the killings in the city of Hanzhong, Xinhua news agency quoted the Shaanxi provincial emergency office as saying.
Seven children were killed along with the kindergarten's operator and her mother in the attack that occurred in the early morning as the school day was about to start. Another 11 children were injured, two of them seriously.
Mr Wu returned home after the attack and committed suicide, Xinhua said.
"The murderer has killed himself," Xinhua quoted local official Wu Xiaoyan as saying.
A preliminary police investigation found that Mr Wu had rented a house to the proprietor of the privately run kindergarten and was upset that the property was not vacated in April, when the school's lease expired.
The ministries of education and public security jointly issued an "urgent notice" after the attack, calling for tighter security at the nation's schools.
A spate of similar attacks on young children has shocked the nation and prompted the government to beef up security at schools due to fears of copycat killings.
On April 30 in the eastern province of Shandong a farmer attacked children with a hammer, injuring five, before fatally setting himself on fire.
The day before, a disgruntled jobless man injured 29 children and three adults with a knife used for slaughtering pigs, at a kindergarten in the eastern city of Taixing in neighbouring Jiangsu province. Earlier the same week, a 33-year-old teacher on sick leave due to mental health problems injured 15 students and a teacher in a knife attack at a primary school in the southern province of Guangdong.
And in March, a former doctor enraged by a split with his girlfriend stabbed eight children to death and injured five others in Fujian province. He was executed last month.
Authorities across China have reportedly implemented measures to strengthen schools' security, increasing police patrols near school grounds and boosting the monitoring of people known to be mentally ill.
Violent crime has increased in China as tight controls on society have been loosened in concert with the country's transition from a state-planned to a capitalist economy.
Studies have also shown a rise in mental disorders, some linked to stress as society becomes more fast-paced and communist-era supports are scrapped.
A study last year estimated that 173 million adults in China had some type of mental disorder, 91 per cent of whom had never received professional help.
Ma Ai, a criminal psychologist with the China University of Political Science and Law in Beijing, said the country had failed to accurately gauge how sweeping economic change could affect the population's psychological well-being.
"The recent cases serve as a warning," Dr Ma told AFP. "Hopefully in the future, we can improve... so that every person's mental development can be healthy and (people) have the ability to face this environment and deal with it."