Two Westpac Rescue Helicopter units were tasked by New South Wales Ambulance at 8.30am on Monday morning following the report of a serious motor vehicle accident on Bundarra Road at Sauramez Ponds west of Armidale.

A multi-agency emergency service response was required to free those trapped at the scene.

Local NSW Ambulance paramedics and the two helicopter critical care medical teams treated and stabilised a male occupant in his 40's and a 52-year-old woman.

Both sustained serious head injuries and were airlifted and taken to John Hunter Hospital for further treatment.

A man and woman aged in their 70s were the occupants of the other vehicle, and NSW Ambulance Paramedics transported them to Tamworth Rural Referral Hospital where they are in a stable condition.

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