A robber asked two young boys to help him steal from a shop on Christmas Eve before threatening them with a knife.
Shortly before 12.50pm on 24 December 2012, a 14-year-old boy and his 11-year-old friend were on Middleton Road, having just left the tram stop at Bowker Vale, when the offender approached them and asked the pair to help him rob a nearby shop.
When they refused he produced a knife, pointed it at the elder boy and demanded his mobile phone.
The boy gave the offender his Blackberry 8520 and the robber ran off down Middleton Road and onto Meade Hill Road before running onto Mosslee Avenue, Prestwich and out of view.
He is described as white, 15 or 16 years old and of medium build. He was wearing a distinctive blue baseball cap with the letters YMCMB across the front, a grey jumper with a red bubble jacket over the top, grey tracksuit bottoms and white Nike trainers. He spoke English, but with a 'foreign accent'.
Detective Constable Kelly Featherstone, said: "It is sad that two young boys, aged just 11 and 14, have experienced a knife point robbery first hand at such tender age.
"They were no doubt fearful and I must credit them for standing up to the offender when they were asked to become accomplices in a robbery, regardless of whether or not this was a genuine request.
"If anyone saw someone matching the offender's description in or around the area on Christmas Eve or you think you know who is responsible please get in touch."
Anyone with information is asked to call police on 0161 856 3925, or Crimestoppers, anonymously, on 0800 555 111.