Most of Hong Kong's metro system remains shut after a day which saw stations and businesses attacked in violent anti-government protests.

Only the Airport Express remained open as protesters began fresh demonstrations in the autonomous Chinese territory.

Chief executive Carrie Lam has defended her decision to invoke emergency powers in order to restore order.

Hong Kong had been through a "very dark night" of "extreme violence", she said.

Unrest intensified on Friday after a young demonstrator was shot in the leg by a police officer.

Protesters have also called on people to defy a ban on face masks announced by Ms Lam.

Unrest in the former British colony started in June, sparked by proposals to extradite suspected criminals to mainland China.

The extradition bill was subsequently cancelled but protests have widened into pro-democracy and anti-police demonstrations.

BBC