Gardaí in Kildare are asking for anyone with information to come forward.
Gardaí in Naas are appealing to the public for assistance in tracing the whereabouts of 17-year-old Mario Tache.
Mario, from Balbriggan, Co Dublin is described as 5ft 8” in height, with short black hair, brown eyes and of slight build.
Despite a number of unconfirmed sightings in the north Dublin area in recent weeks, the teenager was last seen on Main Street, Naas on the 11th of June.
Anyone with information is asked to contact Naas Garda Station 045-884300 or the Garda Confidential Line 1800 666 111.