Pro-democracy protests in Hong Kong have turned violent, with petrol bombs and bricks thrown outside government offices.
Police responded by spraying chemical-laced blue water from a water cannon, and firing tear gas.
A mixed crowd of hardcore protesters in black and wearing masks, along with families with children, spilled into the roads of the Causeway Bay shopping belt and marched for more than a mile to the Central business district, in defiance of a police ban.
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