Hong Kong riot police on Sunday forcefully broke up a rally of pro-democracy protesters showing solidarity with China's oppressed Uighur minority.
Police later swooped in using pepper spray to disperse protesters, who countered by throwing glass bottles and rocks.
Beijing has denied mistreating Uighurs and acted in defiance of a chorus of international criticism over the harsh crackdown.
China runs Hong Kong under a "one country, two systems" model that grants the financial capital expanded freedoms not enjoyed on the mainland.
Many Hong Kongers view China as encroaching on these freedoms and fear mainland policies will come to the city.
In 2047, 50 years after Britain handed the city back to China, the deal granting Hong Kong special rights ends.
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