About 4pm on Thursday  police and emergency services were called to the Barrier Highway; about 110km from Cobar after a blue Toyota RAV4 SUV left the road and rolled.

A 25-year-old woman was driving the car and travelling with her 19-month old son and six-month old daughter.

The woman was treated at the scene by NSW Ambulance Paramedics for a laceration to her forehead and injury to her hips and her daughter sustained minor bruising to her head.

Both were conveyed to Cobar Hospital where they remain in a stable condition.

The 19-month old boy died at the scene.

A crime scene was established and officers from Darling River Local Area Command and the Metropolitan Crash Investigation Unit are investigating the incident and preparing a report for the information of the Coroner.

Meanwhile, Police from Canobolas Local Area Command have located a woman who went missing from Orange earlier this week.

The 35-year-old was last seen at 1.20am on Monday on Leura Road, Orange.

About 10.30am onThursday 5 May 2016), the woman was located safe and well in Lewis Ponds.

Officers from Canobolas Local Area Command would like to thank the community and members of the media for their assistance with this matter.