Police are concerned for a teenager missing from the Maltby area.
Jonathan Williamson, aged 19, was last seen at around 3.40pm today.
He suffers from learning difficulties, is unable to speak, and communicates via sign language.
Jonathan is 6ft 4ins tall, of slim build and was last seen wearing a grey/green top with orange lining in the hood, dark blue tracksuit bottoms and a baseball cap with sunglasses attached to the top and a superman logo.
Anyone who has seen him is asked to call South Yorkshire Police on 101 quoting incident number 598 of Wednesday, October 1.