Disturbing allegations of child abuse at yet another Chinese kindergarten have prompted a government investigation into early education facilities across the country, as Chinese parents and other netizens express their fury and anxiety online.

Several children, some as young as three, who attended RYB New World Kindergarten in Beijings Chaoyang district told their parents theyd been fed pills that made them drowsy, jabbed with needles as punishment and forced by naked adults to strip naked, according to local media.

The school is run by RYB Education, a company that is based in Beijing but listed in New York. It operates kindergartens and day care centers in about 300 Chinese cities .

Chinas Ministry of Education said on Thursday that it had launched a special investigation into the operation of kindergartens nationwide, Reuters reported. Beijings municipal education authority said that it had begun its own probe.

Authorities have not confirmed any of the allegations of abuse.