Gardaí in Dingle Co Kerry are seeking the public's help in tracing 80-year-old Tony Crickard of Norfolk Parade, Belfast.
Mr Crickard was last seen yesterday on Green Street in the town going into the church.
He is described as being 5 feet 9 inches tall and of slight build. Mr Cricard is bald, wears glasses and speaks with a northern accent.
Anyone with any information is asked to contact the gardai in Dingle on 066 9151522.