Northland Police have launched a homicide inquiry following the death of a baby girl in Kaitāia.
A post-mortem indicated to police the baby died of non-incidental injuries.
The baby was found dead on February 19 after police attended an incident at the Kaitāia address.
Acting Detective Inspector Lloyd Schmid said enquiries are ongoing and a scene examination is being carried out at the address.
"Police will thoroughly investigate the matter and use resources from across the Northland district to ensure we have a thorough understanding of the circumstances surrounding the incident," Schmid said.