The suspect was unknown in the village and might be mentally ill, some villagers said.
The elderly woman and most of the injured students suffered head wounds. And some of them were in shock, according to the People's Hospital of the county, which received most of the people injured in the attack.
"I want to go home!" cried a 7-year-old pupil surnamed Wei, who arrived at the hospital in a serious condition with a skull fracture.
The boy's coat was stained with blood and he was quite scared after being wounded, according to the boy's relatives.
The case is under investigation.
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