Details surrounding the incident are still emerging. A 32-year-old man - believed to be related to the baby - was arrested at the home.
Det Insp Noble said the man was extremely distressed by the incident.
Neighbour Simone Gowland heard the man screaming and crying as police arrived at the scene in the early hours of Monday morning.
“He didn’t put up any fight - he just sobbed as police loaded him into the wagon,” she said.
The infant died in Wagga Wagga Base Hospital, NSW.
Police will wait for a post-mortem examination to determine the exact cause of the baby’s death.
“It’s sort of unclear at this stage ... we can’t definitively say whether it was caused by an illness or an injury,” Det Insp Noble said.
The baby’s mother is also assisting homicide detectives with the investigation. She and her extended family are receiving support.
The family are understood to have lived in the region for some time. Officers who first attended the incident were understandably shaken by the tragedy, Det Insp Noble said.
“He’s such a tiny, young child and it does make it quite profoundly upsetting,” he said.
“If anyone in the community does have any more information they should ring us here at the station immediately.”
A crime scene has been set up around the home and detectives are continuing to speak with neighbours.
what can you say??... if the baby was harmed its evil I cant think of anything else to call it..