The black-clad protesters, armed with iron bars and self-made shields, chanted anti-government slogans at times. Most of them wore surgical masks to hide their identity from the police.

Some protesters besieged and vandalized a police vehicle, forcing riot police to fire tear gas to disperse the crowd.

The police said in a statement that the dispersal operation was needed as protesters' behaviors threatened the safety of the police officers in the vehicle.

The report room service at Yuen Long police station has been suspended until further notice after a large group of protesters besieged the station.