Thousands of pro-democracy protesters are blocking Hong Kong's streets, shutting down the territory's business hub and ignoring appeals to leave.
Crowds remained on the streets overnight after a day that saw riot police deploy tear gas and batons in a bid to disperse them.
On Monday, the Hong Kong government said riot police were being withdrawn as people had "mostly calmed down".
But some banks and schools were closed, and there was transport chaos.
Protesters - a mix of students and supporters of the Occupy Central pro-democracy movement - are angry at Beijing's plans to vet candidates for Hong Kong's 2017 leadership elections.
They want a free choice of candidates when they cast their ballots for the chief executive - something Beijing says is out of the question.