The mass arrests, including of former lawmakers, were the largest move against Hong Kong’s democracy movement since the law was imposed by Beijing.
Authorities are stepping up a crackdown on opposition to tighten Beijing’s control over the territory.
“It marks the end of Hong Kong that the world knew before,” pro-democracy activist Joshua Wong said.
Members of a pro-democracy group were granted bail Friday, but authorities in Hong Kong are continuing their ban on non-authorized rallies.
He was invited to speak in Bangkok but was detained and sent back.
The demonstrations paralyzed many streets of the Chinese-ruled city in 2014.
More than 100,000 people took to the streets at the height of the demonstrations.
Pro-democracy members of Hong Kong's legislature blocked passage of a Beijing-backed proposal for electoral reform in the
Join Alyona as she takes you through the day's top international stories, including hundreds of protester arrests in Hong Kong, China's new ban on Islamic veils and one man's story of growing up in Guantanamo.
A Reuters witness saw police take away Shum, and the Facebook page of the student group Scholarism announced that Wong had