The PSNI have confirmed they are making inquiries in response to reports that Derry man Eamon Bradley has turned up in Syria.
Searches are understood to have been conducted at the home of the 25-year-old on Thursday evening.
Unconfirmed reports suggest that specialist officers were deployed to an address in the Creggan estate, but it is unclear if any material was removed from the scene.
A PSNI spokesman would only confirm on Friday: “Police are making enquiries into reports of a Northern Ireland man in Syria.”
Eamon Bradley’s family were this week said to be growing increasingly concerned about his well-being since he disappeared several months ago.
It is understood the former St Joseph’s Boys School pupil had told his relatives he was going for a two week holiday to Turkey, but has not returned.
Reports suggest he has developed a strong interest in the Islamic faith over recent times.
Since he left, photographs have surfaced reportedly showing Eamon on horseback having grown a beard and wearing combat-type clothing and a headdress.
Another appears to shows him kneeling in a shelter with AK-47 assault style rifles bundled in front of him.
A woman at the address in Creggan declined to speak to the Journal when contacted on Thursday.