Update: Anne Quilton McAreavey and Gabrielle Quilton McAreavey have been located safe and well.
Gardaí have thanked the public and the media for their assistance.
Anne Quilton McAreavy, 16, and Gabrielle Quilton McAreavey, 15, have been missing from their home in the Dundalk area since January 8.
Anne is described as being 5ft 1in, while Gabrielle is 5ft 3in.
Both girls have brown hair and eyes and are of a slim build.
They were last seen in the Dundalk area and are believed to currently be together.
Anyone with information on their whereabouts are asked to contact Gardaí in Dundalk on 042 938 8400 or the Garda Confidential Line on 1800 666 111.