Evidence has emerged youths were planning further trouble in Sutton town centre last Tuesday.
Rumours on social networking site Twitter and Facebook suggested Sutton could be a major target for rioters, causing many businesses to close early on police advice.
CCTV footage found after work by Sutton's town centre manager showed two youths piling up 600 bricks in a side street, which police believe were intended to be used as weapons.
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