Gardaí in North Dublin are seeking the public's assistance in tracing the whereabouts of 24-year-old Paul Byrne.
He was last seen at around 3am in the early hours of Christmas morning on Sandy Lane in Rush, Co. Dublin.
Paul is described as being 5 foot five inches tall, with blue eyes, of thin build and with short, light brown hair.
When last seen he was wearing grey tracksuit bottoms and a black short jacket with the Ralph Lauren logo on the left side of the jacket.
Anyone with information is asked to contact 01- 802 0510