A four-month-old baby girl suffered a range of horrifying injuries including a fractured skull, and police say the injuries are associated with "non-accidental" incidents.
The Howick baby was admitted to Middlemore Hospital on Febuary 18 with a range of injuries, police say.
"Medical staff discovered significant fractures to her body, which included to her skull, ribs, arms and legs," Detective Senior Sergeant Eddie Sutherland said in a statement.
"The fractures have been described by medical experts as being of varying ages and classically associated with non-accidental injury.
"Thankfully, the child is going to make a full recovery however Police are extremely concerned by these injuries and Oranga Tamariki has been notified."
No charges have been laid, but enquiries are ongoing.
The girl is in the care of Oranga Tamariki.
"We are now urging anyone with information which can assist our investigation to do the right thing and contact Police," says Detective Senior Sergeant Sutherland.
"Anyone with information is urged to contact the Counties Manukau Child Protection team on 09 213 8571 or anonymously to the crime stoppers reporting line on 0800 555 111.
"You can also send us a private message on Facebook."