Two childcare centre staff have been stood down while claims of mistreatment of children are being investigated.
The investigation into Tokoroa-based Te Rau Oriwa Early Learning Centre was launched after allegations of child safety breaches.
Up to 50 children from three months to 6-years-old attend the childcare centre.
It has been reported that allegations involve one child having their mouth washed out with soap, another being force fed and one child being locked in a cupboard for a few seconds.
The staff members at the centre of the allegations have been stood down on full pay while Te Wananga o Aotearoa, the governing body, continues its own investigation.
It was reported police were first made aware of concerns on February 14, which resulted in a number of people being spoken to and statements taken.
Child Youth and Family and the Ministry of Education are now leading the investigation.
The Education Review Office visited the centre last year and a report, which was released in November, said while self review within the centre was well organised and managed, the management team agreed that it was timely to consider more in-depth, longer-term reviews that identified important issues that affected the centre as a whole, including its community.