Police have begun advancing on Hong Kong's legislature building to clear protesters who broke into it and vandalized offices and the main chamber.
An AP journalist said he could feel tear gas Monday night as he and other media left the building with protesters.
The crackdown began around midnight.
Police earlier announced they would begin clearing the building and warned they would use appropriate force if they encountered resistance.
Hundreds of protesters broke into the building at about 9 p.m. and spray-painted slogans on the walls of the main chamber.
Meanwhile, hundreds of thousands of others marched through the city to demand expanded democracy on the 22nd anniversary of the former British colony's return to China.
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