Hong Kong’s Mass Transit Railway (MTR) Corporation suspended all cross-border services to mainland China after footage emerged of a train enroute to Guangzhou being attacked by more than 20 black-clad assailants, according to reports on Tuesday.

There was a footage that revealed that on October 4, the train taking passengers to Guangzhou was surrounded when it reached the station, the South China Morning Post reported.

The video showed attackers using hammers and steel bars to smash the glass windows of the train and the surveillance cameras on the station platform.

The cross-border service has become the latest casualty in the sustained campaign of vandalism by hard-core elements of the anti-government movement against the city’s rail operator. The destruction escalated last Friday, with fires lit at exits, turnstiles destroyed, MTR workers assaulted and station offices smashed or flooded.

Early on Monday, the MTR Corp expressed its anger at protesters who undermined railway safety by setting fires at multiple locations and damaging facilities.

“The MTR Corp strongly condemned the re occurrence of these illegal and irresponsible behaviours, which should not be tolerated. The Corp had reported the cases to the police,” it said.

Early on Monday, the MTR Corp expressed its anger at protesters who undermined railway safety by setting fires at multiple locations and damaging facilities.

“The MTR Corp strongly condemns the reoccurrence of these illegal and irresponsible behaviours, which should not be tolerated. The Corp had reported the cases to the police,” it said.

On Saturday, Hong Kong’s entire mass transit rail system was suspended after a night of violence sparked by a ban on pro-democracy protesters wearing face masks, as the government imposed emergency powers not used in more than half a century.

The ban was imposed under emergency powers not used in more than half a century that aimed at quelling nearly four months of unrest but instead triggered mass protests and vows of defiance, with a 14-year-old boy reportedly shot and wounded.

Earlier on Friday, Lam intoduced a ban on people wearing masks at public rallies, colonial-era emergency legislation that has not been used in more than half a century.

“We believe that the new law will create a deterrent effect against masked violent protesters and rioters, and will assist the police” in law enforcement, Lam said.