The incident happened at the Caterpillars to Butterflies early childhood learning centre on Auckland’s North Shore about midday yesterday.
All three staff were discharged from hospital yesterday and were well, a spokesman for the daycare said.
“We’ve been in touch with parents and caregivers to let them know the situation and we encourage our families to get in touch if they have any questions,” spokesman Justin Wood told the Herald.
A staff member told the Herald at the time no children had been harmed by the incident. She said teachers had been made unwell.
A police spokesperson said inquiries were under way into the exact circumstances surrounding the incident.
Children remained at the centre throughout the ordeal.
One parent told the Herald the centre had been calling parents to notify them of the incident. At 2pm parents had started arriving to pick up their children and take them home early.
Ministry of Education North leader Isabel Evans said the incident was attended by Fire and Emergency New Zealand (Fenz) and St John Ambulance.
“Centre management managed this isolated incident in accordance with their emergency management protocols.
Fenz had cleared the centre to continue to operate as normal and relief staff had been called in.
“Our traumatic incident team will provide support for as long as required.”
A St John spokesman said one person in moderate condition and two people in serious condition were being transported to North Shore Hospital.
They said St John responded with two rapid response units, four ambulances, and one operations manager.