Nineteen primary school students were hospitalised in central China after drinking yoghurt that was poisoned by a woman.
The 34-year-old woman handed out the yoghurt to students as they were leaving their school on Wednesday, local authorities said.
Police in Loudi City of Hunan Province detained the woman.
She confessed to having injected rat poison and herbicide into the yoghurt before handing it out to the students. The woman is suspected of suffering from a mental disorder, police told the state-run Xinhua news agency.
The condition of three students was described as serious by doctors.
