Police have released CCTV images as they continue to search for a gang of muggers.
The muggers threatened to hurt a teenager if he refused to hand over his iPhone 5 on a footpath between Ewell East station and Reigate Road in Ewell.
Detectives are asking witnesses to come forward with information about the mugging at 8.30pm on Wednesday, March 4.
Detective Constable Errol Chetty, said: "I would ask the men in the images or anyone who can identify them to contact Surrey Police with information.
"It is extremely important that we trace these people as they could hold information vital to our investigation."
Anyone with information should call Surrey Police on 101, quoting reference 45150018242. Alternatively call Crimestoppers anonymously on 0800 555 111.
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