Emergency services were called to the intersection of the Sturt Highway and Mates Gully Road at Borambola around 4am.

"It looks like a vehicle has crashed into a truck," a spokesperson for NSW Police confirmed, adding police were still on scene soon after 7am.

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A man believed to be aged in his 20s, who was reported to have been ejected from the vehicle, was treated by paramedics at the scene, a NSW Ambulance representative said.

He was then taken to Wagga Base Hospital with suspected spinal injuries.

Stop/slow conditions were in place on the highway this morning as the clean-up continued and investigations into how the crash occurred carried out.

Diesel was spilled in the course of the crash and motorists were advised to allow extra time and follow directions as they move around the scene.

"There may be short stops of all traffic of up to 15 minutes," NSW Live Traffic advised in the morning.

Fire and Rescue NSW crews spent at least an hour working on the fuel and oil debris, which was spread over several hundred metres.

"We responded to deal with the fuel spillage," FRNSW's zone commander Superintendent Stewart Alexander said.

"We took action to render that safe and we were out there for an hour or so. Fire and Rescue NSW work very closely with our emergency service partners and when we go out there we can do all we can to help those affected."

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