Riot police advanced on tens of thousands of protesters in Hong Kong's Admiralty district on Sunday, and the stand-off continued Monday morning, in the territory's worst incident of unrest in decades.
Police responded with a baton charge followed by volleys of pepper spray and tear gas near government offices, while some protesters erected defensive barricades. Tear gas hasn't been used since a protest during the World Trade Organization meeting in 2005. Unconfirmed rumors suggest that the police may have used rubber bullets.
At least 38 people were injured and hospitalized on Sunday, while 78 were arrested including some leaders, according to CNN.
How did it start?
The chaotic scenes followed a week-long boycott of classes led by Scholarism, a student group.
Starting last Monday, around 13,000 students campaigned against what many view as the encroachment of China's political will on Hong Kong's governance. The protest expanded over the weekend when the Occupy Central movement and Scholarism-led campaign coalesced.
The Occupy Central campaign was initiated by Benny Tai Yiu-ting, associate professor of law at the University of Hong Kong, in January 2013. A series of rallies over the summer of 2014, unsettled many Hong Kong residents, raising concerns about the territory's political future.