The sit-ins began Friday and escalated into Monday in response to police actions at protest sites in other parts of the city.

Officers fired tear gas inside a subway station, apparently the police force’s first use of the weapon in an enclosed area, and charged at demonstrators with batons. Some protesters donned eye patches in sympathy with a woman whose right eye had been injured during the clashes.

Political impact: The antigovernment protests, in their third month, have now disrupted the basic functioning of a financial hub known for order and efficiency. But if the police escalate their response, and videos of bloodied protesters continue circulating online and in the news media, support for the protests could grow.

Practicalities: Here’s what you need to know if you’re flying in or out of Hong Kong.

Another angle: Versace, Givenchy and Coach apologized to China for producing T-shirts that identified Hong Kong and Macau as countries, triggering a backlash online from Chinese consumers who perceived the designs as a violation of China’s sovereignty.