Police have arrested 30 people over the clashes which have erupted in Mong Kok in recent days.
Briefing the media today, Police Public Relations Branch Chief Superintendent Steve Hui said the arrests were for various crimes, including fighting, unlawful assembly, assault, weapon possession, and indecent assault.
He said Police will investigate each case and may make further arrests.
He said the demonstrations have affected the daily lives of Hong Kong people, and the clashes in Mong Kok and Causeway Bay have caused many injuries, including to Police officers.
He said Police are determined and confident they can restore public order and will monitor developments, make assessments, and consider all necessary measures.
Mr Hui reiterated that Police will not tolerate any violence and will take action against such acts.
