Hong Kong police fired multiple tear gas rounds on Saturday night in confrontations with black-clad activists in the city’s Kowloon area, as the Chinese-controlled territory was again rocked by anti-government protests.

Police had kept out of sight during the afternoon as tens of thousands of protesters marched through Mong Kok, usually a busy shopping district. But they charged onto the streets after 9 p.m. (1300 GMT), with hundreds of officers in riot gear pushing back crowds who jeered them.