KEY POINTS:
Police were today closely examining the south Auckland home of a four-month-old boy who is fighting for his life in Auckland's Starship Hospital.
The boy was taken to Auckland's Middlemore Hospital on Saturday night from his home in Papakura with critical head injuries which police said were non-accidental.
Detective Inspector John Tims of Counties Manukau Police said the boy remained in a critical condition with potentially life-threatening injuries.
The baby's parents, aged 18 and 19, have been co-operating with police and have spoken to them along with his maternal grandmother. They were by the baby's bedside today.
Today the police focus was on a forensic examination of the Papakura house and Mr Tims said there was more to be done yet.
"The investigative team will return to the residence tomorrow to continue examining the scene and further advance area canvasses.
"Our aim is to determine how the baby boy sustained his head injuries."
Police spokeswoman Senior Sergeant Denise Traill said it was too early to describe anybody as suspects in their inquiry into how the child received his injuries.
"What we do expect is to complete a really thorough scene examination, thorough understanding of what took place. We're not saying either way if charges will be laid, we need to understand what took place," she told Radio New Zealand today.
"The hospital have advised us the injuries are non-accidental but we need to work through all that."
An 18-month-old sibling of the badly hurt child also lived at the address with the parents and grandmother.
Police said Child, Youth and Family were working with police over the older child.
Neighbours said they knew little about the family who lived at the rundown home.
One woman said parties were always being held and people came and went at all hours.
Yesterday, empty beer bottles lay on the unmown lawn with other rubbish.
- NZPA