Five young children have been hurt at a school in north-eastern China after a man attacked them with a hammer before killing himself.
It was the third such incident in China in as many days.
The man, said to be a local farmer, grabbed two children before setting himself on fire at the pre-school in Shandong province's Weifang city.
The children were pulled to safety, and all five - plus an injured teacher - were said to be stable in hospital.
China is reeling from a spate of apparent copy-cat attacks in schools.
On Thursday, 28 children - most of them aged around four - and three adults were attacked by an unemployed man wielding a knife at a nursery school in Jiangsu province, eastern China. Five of the children were taken to hospital in a critical condition.
And a day earlier, some 15 pupils and a teacher were wounded by a former teacher - who was on sick leave - at their primary school in Guangdong province.
Earlier on Wednesday, a doctor convicted of stabbing eight children to death in Fujian province in March was executed.
Friday's attacker was a local farmer identified as Wang Yonglai, Xinhua news agency reports.
CHINA SCHOOL ATTACKS
30 April 2010 Five children hurt in hammer attack in Weifang, Shandong
29 April 2010 - three adults and 28 children injured in Taixing, Jiangsu
28 April 2010- at least 15 children and one teacher injured in Leizhou, Guangdong
24 March 2010- eight children killed in Nanping, Fujian
November 2004 - eight boys stabbed to death in a school dormitory in Ruzhou, Henan
September 2004 - 28 children knifed in nursery in Suzhou and 24 children at a school in Shandong
August 2004 - pre-school doorman kills one child and injures 14 in Beijing
He used a motorcycle to break down the gates in to Shangzhuang primary school, striking a teacher who tried to stop him and then turning the hammer on the children.
He grabbed two of the children before dousing himself in petrol and setting himself alight. Teachers seized the two children from him in time.
The motive of the attack is not yet known.
The BBC's Chris Hogg in Shanghai says the attacks are unsettling in a country where such violent attacks are rare.
Since a spate of attacks in 2004, many schools in China have employed professional guards but the latest incidents have led to public calls for increased security in schools.
The education ministry ordered all schools to upgrade their security facilities earlier this month, as well as teach students about safety and ensure young children are escorted home, state media has reported.
But such measures are expensive, says our correspondent, and in reality there is little that can be done to prevent such acts of violence.
The incidents have also sparked a debate about the motives of the killers, with some suggesting that rapid social change and growing unemployment has led to an increase in psychiatric illnesses.