A motorbike rider has died following a head on collision with a truck on the Stuart Highway 30km south of Adelaide River.

Police were notified of the incident just after 1:00pm.

The cause of the collision is currently under investigation and members from the Major Crash Unit remain on the scene. The deceased is yet to be identified.

This part of the Stuart Highway remains closed with diversions for light vehicles down Dorat Road.

The Territory road toll now stands at seven.