Police and the family of 15-year-old Marc Shields are growing concerned for his well-being.
Marc was last seen at his home in the Hawthorn Grove area of Derry City on Thursday morning last, 25th.
He is described as being 5ft 10ins tall and of a slim build. He has short brown hair.
Anyone who has seen Marc or knows if his present whereabouts is asked to contact police at Strabane Road on the 101 non-emergency number.