NT Police attended an incident on the Stuart Highway at The Narrows shortly before 2pm on Friday 16 October.
A pedestrian had been struck by a vehicle. The driver stopped to render assistance when an altercation has occurred.
The driver has then driven to a nearby location where he contacted police.
The pedestrian and another person that approached the driver were taken to Royal Darwin Hospital by St John Ambulance with non-life threatening injuries.
The vehicle was seized for further forensic examination with traffic temporarily being disrupted in the area.
Investigations are continuing into the circumstances.
Anyone with information or who was travelling in the area, particularly vehicles with dashcam or mobile phone footage is urged to contact police on 131 444 or CrimeStoppers 1800 333 000. Please quote reference number 9452952.