The Northern Territory Police Force is investigating a fatal crash that occurred on the Stuart Highway yesterday.

Around 2:55pm, the Joint Emergency Services Communication Centre (JESCC) received a report of a single vehicle crash on the Stuart Highway, about 21km north of Threeways Roadhouse.

A southbound vehicle had reportedly rolled, and a male and female were trapped inside. Several motorists passing by stopped to render assistance.

Emergency services attended, and both the 73-year-old male driver and 66-year-old female passenger were pronounced deceased at the scene. Next of kin were notified in the early hours of this morning.

A crime scene has been established, and one lane of the Stuart Highway is open to allow for traffic flow while investigations are ongoing.

Detectives from the Major Crash Investigation Unit urge anyone with information to make contact on 131 444. Please quote reference number P25211011.

The lives lost on Territory roads now stands at 26.