The Northern Territory Police Force continue to hold concerns for the welfare of 31-year-old Marius who remains missing in East Arnhem Land.

The search yesterday covered approximately 76 square kilometres and that area will be expanded today with ongoing helicopter, ground and vehicle assets deployed.

NTPF Search and Rescue members, local Police, NTES, NTFRS, Dhimurru Rangers, Yirralka Rangers, NORFORCE and Nautilus Helicopters have all been mobilised as the search continues.

Police are particularly interested in anyone who saw the vehicle Marius was believed to be driving in on the day of his disappearance.

The vehicle was a Blue Toyota Hilux Duel Cab with the registration CG10EZ.

The vehicle has since been recovered abandoned on the Central Arnhem Highway.

Anyone with information is urged to contact the Northern Territory Police Force on 131 444 or visit your local station. Please quote reference NTP2600049591.