Hong Kong Extradition Bill Protest
Hong Kong has been left in shock after a night of violence on Sunday which saw dozens of masked men storm a train station and attack commuters.
The men - dressed in white shirts and suspected to be triad gangsters - assaulted pro-democracy protesters and passersby in the district of Yuen Long.
This is the first time this kind of violence has been seen in the ongoing anti-extradition demonstrations.
Several lawmakers questioned why police were slow to arrive at the scene.
Footage posted on social media showed dozens of men attacking people with batons inside the station.
Forty-five people were injured, with one person in critical condition.
Police on Monday said they had not made any arrests but were still carrying out investigations.
The mob attack followed a pro-democracy rally on Sunday in the centre of Hong Kong, where riot police had fired tear gas and rubber bullets at protesters.
The masked men stormed Yuen Long MTR station at about 22:30 local time attacking passengers and people making their way back from the protest.
In a statement, the government said that in Yuen Long "some people congregated at the platforms of the MTR station and train compartments, attacking commuters".
The statement said this is absolutely unacceptable to Hong Kong as a society that observes the rule of law.