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The protests in Hong Kong against an extradition bill that allows people to be sent to mainland China continues to gather steam, and the mass actions are unlikely to end soon, an official of Bayan-Hong Kong said Wednesday.

Emman Villanueva, chairperson of Bayan Hong Kong and Macau, said more people were expected to join the protests Wednesday night.

Attendance at the protests, Villanueva said, has exceeded the 2014 "Umbrella Movement" protests that saw thousands take to the streets.

Even expats in Hong Kong should be concerned about the extradition bill, Villanueva said.

"There are so many provisions in the extradition law, that anyone who lives in Hong Kong, whether they are locals or expats, should be, you know, very concerned," Villanueva said in an interview with ANC's "Market Edge."

Villanueva cautioned migrant workers in Hong Kong about joining the protests, saying some who took part in the mass actions have been arrested.