Hong Kong police fired tear gas at protesters on Sunday as thousands gathered outside a police station in Sham Shui Po to defy a police ban on marches.
This comes after leader Carrie Lam warned she would grant no concessions to the demonstrators.
Thousands of activists also occupied the airport arrivals hall for a third day, while others gathered at city parks.
The protest movement, which began in response to a controversial extradition law, has gained momentum over the last three months.

Trump says deal to end war to be signed Sunday, Iran questions timing
India Air Force plane crash kills all five onboard
Ukrainian strike kills one, wounds 3 in southern Russia
Trump says US military strike killed leader of Venezuela's Tren de Aragua gang
Qatar rejects media report on energy production decisions
Trump says Iran war deal close as Strait of Hormuz tensions linger
Victims' families mark Air India crash anniversary with prayers and tributes
Ebola outbreak spreads to crowded displacement camp in Congo
