Appeal for missing Strabane teenager

Police in Strabane have issued an appeal for a missing teenager.
17 year-old Tiarnan Gallen was last seen on Sunday in the Liskey Road area of Strabane.
He is described as being approximately 173cm in height of a medium build, with dark hair.
The teenager is believed to be wearing a black Mackenzie hoody with white writing, dark tracksuit bottoms and white Nike Air Max trainers.
Anyone who knows the whereabouts of the missing teenager is asked to contact police at Strabane on the non-emergency number from Northern Ireland 101.