The incident occurred at Avenue De Chartres multi-storey car park on Sunday (July 30) at around 5.50pm, police confirmed.
A police spokesman said: “The man is described as white, aged between 25 and 35 and was wearing a black hooded top, a baseball cap and a Nike T-shirt with luminous coloured writing on the front.
“He was carrying a square shaped Adidas bag.
“If you were in the area at the time or saw anything suspicious please report online quoting reference 1059 of 30/07.”
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