A 4-month-old is fighting for his life after he was injured at a Wairoa home over the weekend, but police say they still do not have a clear picture of what happened.
Child protection officers launched an investigation after the boy suffered critical injuries at a Lucknow St house about 9.30am on Saturday.
The boy was taken to Wairoa Hospital before being transferred that day to Starship Hospital in Auckland, where he remains in a critical condition with life-threatening injuries.
Police and forensic experts have completed a scene examination of the house, but it remains unclear how the baby was injured.
Police Eastern District child protection team head Detective Senior Sergeant David Greig, who is leading the investigation, would not disclose the nature of the injuries.