Northern Territory Police are investigating after a fatal crash in the Victoria Daly Region earlier today.

Around midday, police received reports that a single vehicle had rolled on the Buntine Highway between Top Springs and the Victoria Highway.

Two occupants were declared deceased at the scene with a third occupant conveyed to hospital with serious injuries.

Major Crash detectives have deployed to the area and a crime scene has been declared.

The investigation is in its early stages and police advise motorists travelling on the Buntine Highway to expect delays.