Northern Territory Police are investigating a three-vehicle crash in Coolalinga overnight.

At around 10:30pm, police received reports of a crash near a takeaway restaurant at Coolalinga Central.

Police believe a vehicle travelling along the service road beside the Stuart Highway collided with another vehicle as it turned into the service road.

The impact pushed the second vehicle into the car park, where it struck a parked vehicle.

The occupants of the first vehicle left the scene before emergency services arrived.

Firefighters freed the 29-year-old male driver of the second vehicle, who was taken to Royal Darwin Hospital with non-life-threatening injuries. A 50-year-old man in the parked vehicle suffered minor injuries.

A short time later, a 17-year-old boy contacted police and identified himself as the driver of the first vehicle. He returned a positive alcohol reading and was arrested to undergo further breath testing. He was later released into the care of his mother.

Police believe speed may have contributed to the crash.

Investigations are continuing. Anyone who witnessed the crash or has dash-cam footage from the area is urged to contact police on 131 444, quoting reference number NTP2600085069.