Its Hong Kong affairs department has spoken to the media twice in recent weeks to warn protesters that their actions will not be tolerated. It was not clear how many protesters were inside the station at the time, but it has been rare for officers to fire tear gas indoors.
Though the carrier doesn't disclose a breakdown of its mainland China business, flights originating from there and Hong Kong account for about half of the firm's revenue.
"This is our response to Carrie Lam", he added, referring to the city's Beijing-backed leader.
At Kwai Fong station, police fired teargas to disperse crowds.
Demonstrators, who at one point lobbed two petrol bombs, retaliated with a flash-mob strategy: withdrawing when pressed, only to reappear elsewhere.
The newspaper cited the Hospital Authority as reporting that, as of 11.30 p.m., 13 people had been injured in protests and sent to hospitals across the city. Nine had been discharged, but a man and woman were still in serious condition.
They said that they were disillusioned with the inaction of the current administration that has led Hong Kong "into an age of decay".
Police released a statement, condemning the "violent acts".
Authorities have arrested over 600 people since the rallies began in June. "But [the government] refused to face the loss of control of police and instead showed hostility to the protesters, thereby intensifying the violent confrontations".
Raab's call drew the ire of the Chinese regime.
Yang Guang, a spokesman for the office in Beijing, delivered a televised address on Monday in which he backed police handling of the protests and said that those who care about the city should come out against violence.
The move also signalled China is warning Hong Kong businesses and their workers to stay out of politics. "We still have our rights", she told AFP.
"Beijing wants to use the threat of sending in the PLA, or other direct intervention, to try to scare off the protesters", said Mr Ben Bland, research fellow at the Lowy Institute in Sydney. If Hong Kong loses this foundation, the assets owned by the Hong Kong people could disappear overnight.
After years of growing Chinese intervention in the city, many protesters feel that this is their last chance to defend the city's autonomy. The US has been confronting widespread opposition of its own in the US territory of Puerto Rico.
"We still love Hong Kong and we think Hong Kong still has a chance of obtaining a democratic system".
"But we have to fight for our freedoms and democracy".
"It is simply wrong for the British government to directly call Hong Kong's Chief Executive to exert pressure. Specifically, in the current context, there will be disciplinary consequences for employees who support or participate in illegal protests", Hogg wrote.
Other demonstrators blocked roads in Wan Chai, where police headquarters is located, and the Causeway Bay shopping district, chanting "reclaim Hong Kong, revolution of our times".
It also terminated two airport ground staff for "misconduct".
The Chinese authority's order could threaten not only Cathay's direct flights to China but also those to Europe and the US because those routes fly over Chinese airspace, Jefferies Hong Kong Ltd. analyst Andrew Lee wrote in a note to clients.