The teens handed over a mobile phone and cash before the two men made off on a red moped.
Police are searching for two men who carried out a terrifying robbery in a Worcester Park alleyway.
Two teenagers were stopped by the muggers who then threatened them with a knife in an alleyway off Lancaster Way, Worcester Park, at about 9.30am on Monday, November 21.
The teens handed over a mobile phone and cash before the two men fled on a red moped.
The muggers were said to be wearing masks and crash helmets.
If you have any information call Sutton police on 101, or call Crimestoppers anonymously on 0800 555 111.
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