Protesters were met with tear gas as they rallied on Sunday against the government's anti-mask law.
Footage shows tear gas being fired at protesters and several fires on the road and on the stairs of a Mass Transit Railway (MTR) stations.
A water cannon truck was seen firing blue-dyed jets to put out one of the fires.
Footage also shows some protesters throwing projectiles at driving emergency... Еще vehicles and vandalising merchandise in a store.
Since March, Hong Kong has been rocked by demonstrations sparked by a planned, but now-withdrawn extradition bill. The rallies have evolved into a movement with wider grievances against the Hong Kong administration.
The mask ban was introduced in early October. Failure to comply can result in a fine of up to €2,867 ($3,200) and one year in prison.