For nearly a week, protesters in the semi-autonomous Chinese territory have been coming out in force against a controversial extradition bill that - if passed - would allow suspects to be sent to mainland China for trial.
An uneasy calm had settled over the city after police fired rubber bullets, tear gas and pepper spray in a series of skirmishes to clear demonstrators from the city's legislature.
"This is a sensitive issue, with potentially far-reaching consequences for Hong Kong and its people, for European Union and foreign citizens, as well as for business confidence", it said in a statement.
He said 11 arrests had been made so far and that 22 officers had been injured.
The incident is taking place as mainland Chinese students studying in the United States are harassing a Hong Kong national at Emerson College in Boston, for rejecting a mainland Chinese identity.
When some appeared to have breached a cordon around the building, the police launched their response.
Banks, including Standard Chartered, Bank of China and DBS, said they had suspended branch services in the area. This was based on the "one country, two systems" principle under which socialist and capitalist systems would coexist within one nation.
Demonstrators rest after the night after protests against Hong Kong's controversial proposed extradition law late Wednesday. The group said the police "may well have over-stepped its lawful powers in maintaining public order". China's foreign ministry has declined to confirm any plans for a one-on-one meeting.
Riot police stand guard as protesters walk outside the Legislative Council in Hong Kong, Thursday, June 13, 2019.
A statement from the government's press service said the session of the Hong Kong's Legislative Council that was scheduled to begin at 11am would be "changed to a later time to be determined" by the council secretariat.
And many, too, have been inspired by the previous protest.
Thousands of people joined the protests in the city.
Telegram founder Pavel Durov said a massive cyber-attack on his messaging service originated in China, raising questions about whether Beijing tried to disrupt a protest involving hundreds of thousands that erupted on the streets of Hong Kong. "The situation still needs a peaceful resolution", wrote another.
In April, nine leaders of a 2014 pro-democracy protest movement known as the "Umbrella Revolution" were convicted on public nuisance and other charges. Hong Kong will never be the same again if she succeeds. "We are just doing our duty", he said. Many groups have called a strike to stop the legislation going through.
Yuen, the assistant police commissioner, defended the police handling of the clashes outside the government headquarters, saying officers only acted when they were charged by protesters carrying pavement bricks, planks and iron pipes from a nearby construction site. "HK separatists are truly rampant, it's not easy for HK police", said another.
Hong Kong protestors aren't just using apps to protect their privacy and avoid repercussions from the government.
She also received reports via text from friends in Hong Kong.
More than a dozen opposition lawmakers marched up to the official residence of Hong Kong's leader, Carrie Lam, in Central district on Thursday morning to demand that she withdraw the bill.