Police are using DNA testing to identify the mother of a baby whose body was found at an Auckland recycling facility.
The baby girl was found at the Onehunga site on 16 August.
Detective Inspector Scott Beard said the baby's DNA profile had been obtained and a group of people with a potential family link had been identified.
"This work is extremely complex and will take some time, but we are determined to find some answers for the sake of this little girl," he said.
Police have started to speak to some of these people in the hope of narrowing the group down and identifying the mother.
"As we've said right from the start, we want to make sure the baby's mum gets the support she needs."
Hours of CCTV footage are being reviewed to establish how the baby got to the recycling facility.
This included reviewing the movements of more than 100 recycling trucks that had gone to the recycling facility that day, he said.
Beard said after releasing images of clothing and a blue bag found near the girl at the scene, police have received information from about a dozen people.
"We still don't know for sure whether these items are linked and are keeping an open mind."
He said it was not too late for the newborn's mother or someone within her immediate circle of family or friends to come forward.
"We urge them and anyone else who might know what happened to do the right thing and talk to somebody, whether it's police or someone who can notify us on their behalf."