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.

US and Iran closing in on memorandum to end war, sources say
Trump defends higher ballroom costs, targets less than $400 million
Trump says operation to reopen Strait of Hormuz will be 'paused'
Ukraine says Russia violated ceasefire initiated by Kyiv
Hantavirus-hit cruise ship to head to Spain after being granted permission
