On Monday, Hong Kong police opened fire on protesters as chaos erupted across the city on Monday morning, a local media reported.
A protester in Sai Wan Ho was shot in chaos by a traffic officer. The Hospital Authority said the injured protester was in critical condition and undergoing liver and kidney operation.
Police had fired live rounds at protesters in Central, the eastern side of Hong Kong island.
The protests started in June against a now-withdrawn plan to allow extradition to mainland China, but have since morphed into more extensive demonstrations.