About 12.45pm today (Thursday 19 May 2016), police and emergency services attended Cessnock Road at Testers Hollow, about 5km north of Heddon Greta following reports of a crash.

On arrival, they found two cars – a blue Nissan Pulsar and a white Mitsubishi Magna – had collided head-on.

Both female drivers were trapped in their vehicles for a short time before being released by VRA rescue.

The 33-year-old female driver of the Mitsubishi and her 2-year-old son were assessed at the scene by NSW Ambulance Paramedics and were found to be uninjured. She was breath-tested at the scene with a negative result.

The 21-year-old female driver of the Nissan was taken by NSW Ambulance Paramedics to John Hunter Hospital in a stable condition with head injuries.

Police from Central Hunter Local Area Command have established a crime scene while they investigate the circumstances surrounding the crash.

Cessnock Road is blocked in both directions and local traffic diversions are in place.

Motorists are advised to avoid the area and visit www.livetraffic.com for more information, as the road is expected to be closed for sometime.