A bike was stolen from a rack outside Maidenhead library after the bike lock was cut.
A man was seen pulling the bike from the rack and riding off on it between 3.45-4.45pm on Wednesday.
As he rode-off a box of tools fell from the back of the bike.
The thief is described as white, between 18-20-years-old with short, light blond hair and was wearing long, baggy grey trousers and a tracksuit top.
Call 101 with information.
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