Police are investigating after a four-month-old girl from Howick, Auckland, suffered "significant" multiple fractures to her body.
Middlemore Hospital staff found 16 fractures to her skull, ribs, and limbs, believed to have been sustained over a period of time, when she was admitted in February.
Police told Newshub the injuries are non-accidental.
Detective Inspector Colin Higson told NZME police had spoken to family members but could not yet determine who was responsible.
The child is expected to make a full recovery and is in custody care.
Anyone with information on how the baby girl was injured is asked to call the Counties Manukau Child Protection Team on (09) 213 8571, or call anonymously through the Crimestoppers reporting line on 0800 555 111.
Anyone who is worried about a child can contact Oranga Tamariki immediately on 0508 326 459 or email firstname.lastname@example.org.
If a child is in immediate danger call 111.