The former British colony has been rocked by anti-government protests, with many chafing at Chinese rule.
Footage captured by local television showed police beating protesters with batons and pushing several of them to the ground as protesters attempted to scramble into the metro station.
Police were seen following the protesters down the escalator as they tried to escape.
The increasingly violent protests since June have plunged the Asian financial hub into its most serious crisis in decades and are one of the biggest popular challenges to Chinese leader Xi Jinping since he came to power in 2012.
[NFA] U.S. Secretary of State Mike Pompeo encouraged other nations to follow the UK's lead and push back against the actions of the Chinese Communist Party. Speaking on an official visit to London on Tuesday, Pompeo also described China's leadership as a threat. Adam Reed reports.
Speaking on India-China border tensions, US Secretary of State, Mike Pompeo said, "I have spoken with Foreign Minister S Jaishankar a number of times about this. Chinese took incredibly aggressive actions and Indians have done their best to respond to that. There aren't many neighbours that can satisfactorily say that they know where their sovereignty ends and the Chinese Communist Party will respect that. That is certainly true now for people of Bhutan. The world must come together to respond to this. This increasing revisionist effort that the Chinese Communist Party (CCP) is engaged in is something that President Trump has taken incredibly seriously." He further said, "World has seen true colours of Chinese Communist Party and I am convinced more than ever that free people of the world will come to understand the threat. The impact General Secy Xi Jinping has on the world is not good for free and democracy loving people."