The brother of Stephen Cullinan, the Ballymackey, Nenagh, man who has been missing for 12 days, has vowed to keep searching “no matter how long it takes".
Stephen, 25, has been missing from Castletroy, Limerick, since November 3.
The family and friends of Stephen, son of North Tipperary IFA chair Tim Cullina, mounted a leafleting campaign in Dublin last weekend after Stephen was last seen at St Stephen's Green.
Brian said he will continue the search "until we get the result we all want. No matter how long it takes, we will continue.”
Brian said that while the search in Dublin had not produced any result, he remain “staunchly optimistic” of new leads emerging in the in the coming days.
Stephen Cullinan: last seen in St Stephen's Green
"At this time, we have no further information than what has already been circulated.
"However, we are determined to continue,” he said.
The family is working alongside the Gardai, the public and the farming community in their search for Stephen, and Brian said that they had “complete confidence” in everybody who is part of the search.
Mr Cullinan is described as 5ft 11in, of medium build with short, fair hair.
He was last seen wearing a hoodie and jeans and wears glasses.
Henry Street Garda station in Limerick is leading the investigation and can be contacted at 061-212 400, or any Garda station or the Garda Confidential Line 1800-666-111.