Police have launched a homicide investigation after a baby boy died of significant head injuries.
The one-year-old, from Whangarei, was taken to Whangarei Hospital yesterday at 10am.
In the early afternoon he was airlifted to Auckland's Starship Hospital. He died just before 11pm.
The baby was found to have "significant head injuries", police said.
An autopsy will be undertaken today to determine the cause of death.
Police have 25 staff working to find out what happened to the child.
The investigation involves a forensic examination of a home in Carlton Crescent in Kamo.
Police are also speaking to the family of the baby and carrying out area inquiries in the neighbourhood around the home.