Police are investigating the circumstances surrounding the death of a woman in Narrabri earlier in the week.
Shortly after 10pm on New Years Eve, police were called following reports a woman was lying on the roadway unconscious.
Officers from Barwon Local Area Command and NSW Ambulance Paramedics attended the scene, and found the woman with severe head injuries.
The 43-year-old woman was treated at Narrabri Hospital before being airlifted to Sydney in a critical condition.
The local woman died on Wednesday night.
Barwon LAC Detectives have advised the coroner, and the death is being considered suspicious.
Police inquiries are continuing.