Hong Kong (CNN) For the third time in less than a week, Hong Kong protesters have taken to the streets over a controversial extradition bill with China.

Hundreds of mostly young people surrounded police headquarters in the city's Wan Chai district Friday, after blocking several roads in the area and near government offices in Admiralty, where they had been staging a sit-in demanding the city's chief executive, Carrie Lam, resign and officially withdraw the bill.

Taking a major role in Friday's protests was Joshua Wong, the former Umbrella Movement who was this week released from prison

Pro-democracy activist Joshua Wong speaks to protesters outside the police headquarters in Hong Kong on June 21, 2019.

Speaking to reporters, a police spokeswoman called on protesters to leave the area, but said a "clearance operation" was not planned.

"We respect the rights of the public to express their views in a peaceful manner," she said, adding a negotiation team would meet with protesters in an attempt to get them to move on.

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