Police are asking anyone who had contact with the family of a baby that died in Muswellbrook to come forward.
Hunter Valley Police District (HVPD) officers are investigating after a seven-month-old boy was taken unresponsive to Muswellbrook Hospital on Sunday afternoon.
Tragically, despite the best efforts of hospital staff, the baby couldn't be revived.
HVPD Crime Manager Detective Inspector Matthew Zimmer said the death is being treated as suspicious.
"A crime scene was established at a residential premises in Aberdeen and I can confirm that that crime scene has been processed and examined by specialist forensic officers,"
"A post mortem examination in relation to the child's death will take place within the next 24 to 48 hours in an attempt to establish the cause of death. I can confirm that will take place shortly."
"I anticipate that examination will also identify any injuries that the child may have suffered that may have contributed to the child's death. We are still trying to establish the circumstances surrounding the child's death so we are speaking to people who had contact with the child in the days and hours leading up to the child's death," said Detective Inspector Zimmer.
"We're also asking any members of the community that know the family or who had contact or interactions with the family in the days leading up to the child's death if they could contact Hunter Valley Police District officers or Crime Stoppers on 1800 333 000."
Detective Inspector Zimmer said the family are local and it will be an ongoing investigation.
"We are following a number of lines of inquiry and those investigations will continue,"
"I can say that we are cooperating with the mother of the child and her immediate family as the investigation continues."
Anyone with information about this incident is urged to contact Crime Stoppers: 1800 333 000 or https://nsw.crimestoppers.com.au. Information is treated in strict confidence. The public is reminded not to report crime via NSW Police social media pages.