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A teenage thug has floored a woman with just one punch in a brutal street robbery.
The yob snatched a gold chain around the woman's neck before knocking her out in the horrific attack.
The chilling incident was captured on CCTV and shows the attacker talking to his 32-year-old victim outside a cafe.
He suddenly grabs her chain and walks off with it in his hand in the city of Samara in south-western Russia’s Samara Oblast region.
But when the furious woman follows the thief to demand her jewellery back he punches her in the face and knocks her out cold as the rest of his gang watch on.