TWO people have been killed, and another two airlifted to hospital after a vehicle towing a caravan rolled on a rural highway in NSW.
The horror accident also claimed the life of a pet dog, with crash investigators now trying to piece together what happened.
Tragedy struck about 1.15pm on Thursday, when a Toyota Prado towing a caravan collided with an Armco railing then a tree on the Oxley Highway.
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It happened about 45km east of Walcha.
Police say the front seat passenger, a 72-year-old woman, and rear seat passenger, a 38-year-old man, died at the scene.
The driver, a 58-year-old man, and a 38-year-old female backseat passenger, were both airlifted to Tamworth Base Hospital with non-life threatening injuries.
A pet dog managed to survive the smash, while another sadly passed away.
A cat which was also travelling in the vehicle has not yet been located.
Police from Northern Tableland Crash Investigation Unit are continuing with inquiries into the incident.