Emergency services have attended a crash on the Barton Highway south of Murrumbateman.
According to the NSW police, only one vehicle was involved. It went out of control down a bank near Casuarina Lane at 4.46pm.
Ambulance, police and fire crews attended. The car occupants were treated at the scene and taken to Canberra Hospital. Their condition was not known.
Traffic was moving freely in both directions within two hours of the crash.
Police appealed to other traffic to reduce their speed to 40 kilometres per hour when passing emergency vehicles at the scene.