Police have launched a homicide inquiry after a three-month-old baby girl died in Porirua last week.
A post-mortem and scene examination revealed the baby died of non-accidental injuries on 13 November.
A 22-year-old Porirua man has been arrested and faces one charge of male assaults female and assault on a child.
He will appear in the Porirua District Court on 20 November.
Police said they were working closely with the baby's family.
"This is a tragedy impacting on a large family group," police said.
Police said they are committed to supporting the family and providing answers to them.