Police are appealing for information on the whereabouts of Mark Calvert, who has been reported missing from Bradford.
Mark, who is 16, was last seen in the Clayton Heights area of the city on 13 December.
There are concerns for his welfare as he may be sleeping rough
He is described as being about 5ft 10ins tall and of medium build and was last seen wearing a black coat with a peaked hood, a dark blue Adidas tracksuit and black trainers.
He has links to the Baildon and Holmewood areas.
A police spokesperson said, “Enquiries are continuing to locate Mark and anyone who can assist is asked to contact police on 101, quoting log 1805 of 15 November, or use the live chat facility on the West Yorkshire Police website.”