Hong Kong police clash with protesters over new lsecurity aw

Police in Hong Kong have used pepper spray, tear gas and a water cannon to disperse demonstrators who oppose a Beijing-imposed "anti-protest" law.

Hundreds of people have been arrested at the banned rally, marking 23 years since the end of British rule.

The national security legislation targets secession, subversion and terrorism with punishments up to life in prison.

Activists say it erodes freedoms, but the government in Beijing has dismissed the criticism.