Hawke's Bay police have begun an investigation into how a 10-week-old baby came to have significant non-accidental injuries.
The baby was admitted to Hawke's Bay Regional Hospital early last month after being taken to a local GP by a family member.
Police say he had significant injuries to his body that he could not have received accidentally.
Detective Senior Sergeant Dave Greig says officers are speaking with family members to find out how the injuries occurred and when.
The baby is now in the care of Child, Youth and Family.