Four people were taken to hospital after a crash involving a military vehicle and a sedan near Trangie on Friday.
About 2pm on Friday, emergency services were called to a head-on collision between a Hyundai SUV and a 4WD army vehicle towing a trailer on the Mitchell Highway east of Trangie.
Police attached to Orana Mid-Western Police District allege the sedan crossed to the opposite side of the road before colliding with the 4WD.
The 4WD containing six occupants has rolled several times as a result.
The male and female occupants of the SUV were treated on scene for suspected internal injuries and were taken to Dubbo Hospital.
Two passengers in the 4WD sustained minor injuries and were taken to Dubbo Hospital.
NSW Fire & Rescue HAZMAT attended the scene to contain spill from a vehicle.