A 49-year-old man was arrested after attacking students with a hammer at a primary school in Beijing on Tuesday (Jan 8), in a rare act of violence in the Chinese capital.
The Xicheng district government said that three of the children injured in the attack were heavily hurt but their condition was stable.
Police in the Xicheng district of the city said in a statement on Weibo that they had detained a 49-year-old male suspect surnamed Jia, who was a former fix worker at the school.
The man is a maintenance worker at the school and his contract is due to expire at the end of January, police said.
Though the school was discussing another job posting for Jia, he used a hammer and attacked students to "vent his resentment", they said.
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According to the Beijing Affiliated Elementary School of Xuanwu Normal School website, it has 2,537 students and 199 teaching personnel. Another video shows anxious parents forming a large crowd outside the school's entrance, demanding details.
A doctor at the hospital posted on social media: "The mayor today came to the hospital to wait with us while the children were being medically treated".
The attacker, originally from northeastern Heilongjiang province, has been detained by police and an investigation was under way, state television said.
Two children were also stabbed to death outside a Shanghai kindergarten in June, while nine children died in a knife attack at a school in Shaanxi province in April.
In 2017, a man in his 40s injured 12 children with a vegetable knife during a rampage in the southern city of Pingxiang.