There were no signs on Monday that the demonstration had led any factions within the Beijing-friendly camp to break ranks. The Liberal Party, which is pro-government, said in a statement after the protest that it respected those who demonstrated but would continue to support the bill, the public broadcaster RTHK reported.

The legislation would allow case-based extraditions to jurisdictions with which Hong Kong does not have long-term agreements. The government has said it is necessary to prevent Hong Kong from becoming a haven for fugitives. The bill has set off widespread fears that allowing criminal suspects to be sent to mainland China would accelerate Beijing’s growing influence over Hong Kong and leave locals subject to the whims of the Chinese authorities.



The Hong Kong government has said the bill is necessary to allow the extradition of a Hong Kong man to Taiwan, where he was accused of killing his girlfriend. But the authorities in Taiwan, a self-governed island claimed by Beijing, say they would not agree to the extradition arrangement because it would treat Taiwan as a part of China.

A Taiwanese official said in March that Taiwan had sent three requests to Hong Kong for help with the extradition case, but got no reply. The Hong Kong government has argued it needs to change the law to overcome procedural barriers, but lawyers and opposition lawmakers have accused it of ignoring narrower approaches to handle the Taiwan case.

President Tsai Ing-wen of Taiwan said Sunday that the protesters had her support. “We stand with all freedom-loving people of #hongkong,” she wrote on Twitter.

The protest on Sunday was mostly peaceful, but after midnight, dozens of remaining demonstrators tried to occupy areas around the legislature and clashed with police officers who used pepper spray and batons in an effort to remove them.

Hong Kong’s pro-democracy camp blamed Ms. Lam for the violence, saying that the group of largely young demonstrators had escalated their protest out of frustration with a government statement at 11 p.m. that rejected calls to withdraw the bill.