Gardaí at Store Street Garda Station are renewing their appeal for information in relation to the whereabouts of Christopher Mongan.
The 15-year-old has been missing since March 24, 2018.
When Christopher was last seen on Eden Quay, Dublin, he was wearing a blue jacket, grey tracksuit bottoms and black runners.
Christopher is described as being 5ft 6 in height, medium build, brown hair and blue eyes. He is known to frequent the Clondalkin and Tallaght areas.
Anyone with information is asked to contact Store Street Garda on 01 666 8000.
