Police and the family of 24 year old Tony Browne are becoming increasingly concerned for his welfare.
Tony who is from the Derry area was last seen in the Carnhill area of the City in the early hours of this morning, Tuesday 14 May.
Tony is described as being approximately 5'8" tall, of medium build, with short ginger coloured hair.
When last seen he was wearing a black and white zip top with blue coloured sleeves, white coloured t-shirt and dark coloured jeans.
Police would appeal to Tony or anyone who knows of his whereabouts to contact them at Strand Road Police Station.