Chinese President Xi Jinping has sent a warning that "radical and violent crimes" have seriously "trampled on the rule of law and social order" in Hong Kong.
For more on this and other news around the world, let's turn to our Kim Da-mi.
Da-mi, what exactly did the Chinese leader have to say about the unrest?
Connyoung, President Xi pledged Beijing's firm support for Hong Kong's policein punishing what he calls "violent criminals."
Speaking on the sidelines of a summit in Brazil on Thursday, he said the continuous violent activities seriously challenge the "One country, Two systems" bottom line.
Although he didn't specify how the central government would impose its will, Xi noted the Chinese government is more than determined to oppose any external force interfering in Hong Kong's affairs.
He then reiterated that "stopping the violence and restoring order is Hong Kong's most urgent task" at the moment.
While he was delivering his remarks, pro-democracy protests in Hong Kong continued Thursday for a fourth consecutive weekday.
Student protesters barricaded themselves inside universities, which will be closed until Sunday due to the turmoil.
Riot police responded with teargas and petrol bombs.
The clashes have become so intense that international students including South Koreans are leaving the city, as several universities cancelled classes for the rest of the semester.