Authorities say two children have died and another 30 are sickened in a mass poisoning at a kindergarten in southwestern China.
Investigators identified the toxic substance as a powerful rat poison, but do not yet know how it was administered Wednesday in the kindergarten in Yunnan province's rural Qiubei county. State broadcaster CCTV says the school began accepting students last year despite not being fully licensed.
Along with the victims, aged 4 and 5, 12 others remained hospitalized Friday, three of them in serious condition.
Chinese schools have suffered a series of mass stabbings and other attacks by mentally disturbed people or those bearing grudges. There have also been incidents of school staff administering medication without authorization.