Gardaí are appealing to every person in Donegal to keep a look out for Cian Langelaan, who is missing since September.
The 27-year-old was reported missing from the Falcarragh area and the last known sighting was on the 27th of September in the Horn Head area of north Donegal.
Cian is 5 ft 8 inches tall and of medium build. He has sandy coloured hair.
His family are very concerned for him.
The public has been asked to continue to keep an eye out for him as they go about their daily business. Gardaí are also urging landowners across the county to check any outhouses they may have.
If anyone has any information in relation to the whereabouts of Cian, they are asked to call Milford Gardaí on 074-9153060 or contact any Garda Station.