The boy’s parents were at their home on Jeffs Close in Kariong with the newborn when their pet dog attacked at 2.18am this morning.
First on the scene were the Brisbane Water Police, who began performing CPR on the injured five-week-old before paramedics arrived and took over.
However, the baby was unable to be revived and died at the scene.
NSW Police’s Superintendent Darryl Thompson described the attack as “a matter of tragic proportions”.
“It is subject to investigation and we will be making a report to the Coroner,” he said.
The dog, an American Staffordshire Terrier, has been seized by the local council and is expected to be euthanised.
A crime scene has been established, but police say there are no suspicious circumstances surrounding the incident.
“Out of respect for the family, I won’t be drawn on specifics (of what occurred), but suffice to say that our investigators from Brisbane Water PD will be making a full disclosure of the circumstances to the Coroner,” Superintendent Thompson said.