Chinese state media say a man stabbed 22 children and an adult at an elementary school in central China on Friday.
The official Xinhua news agency says the knife-wielding man attacked the children outside a school in Chenpeng village in Henan province. It said the children, whose ages are not known, suffered non-life-threatening injuries.
Police say the attacker was later detained, but gave no motive for the stabbings.
Schools in China have increased security following a series of deadly attacks on students in recent years, mostly involving mentally unstable men.