Police Scotland are appealing for information to help trace Sergei Ivanov who hasn't been seen since Monday, 3 April, 2017 in Papa Westray, Orkney.
Sergei Ivanov, 55, was last seen around 10am walking on a road near to his home address towards the South of the island.
Coastline and land searches were carried out by both Police and Coastguard including the use of the helicopter.
Sergei was wearing a black jumper, black trousers, long black coat (below his knees) and black work-type boots.
Sergei is described as around 5' 10" tall, with long grey hair and a medium build.
We would urge anyone who may have information to contact police as a matter of urgency on 101.
Police Scotland works in close partnership with the Missing People Charity - the only charity in the UK which specialises in and is dedicated to bringing missing children and adults back together with their families.
They can be contacted via telephone on free phone 116 000 or by visiting the Missing People Website.
Call 101 for non-emergencies and general enquiries, in an emergency call 999. If you have information about a crime you can also contact the charity Crimestoppers anonymously on 0800 555 111.