Fiery clashes erupted across the city, with security chief John Lee cautioning "unthinkable" consequences if the violence continued.
Authorities have shut down schools, rail links and several businesses in the Asian financial hub as a safety precaution.
On Tuesday night, hundreds of black-clad protesters tried to block riot police from entering the Chinese University of Hong Kong (CUHK) near Tai Po by hurling bricks and petrol bombs.


Textile factory fire in southern Chinese city of Foshan kills 8
At least 3 killed in Pakistani airstrike on Afghanistan
Typhoon approaches eastern Japan, prompts flood and landslide warnings
Australia to seek UN Security Council seat from 2029
