Beijing: Seven pro-democracy politicians have been arrested over an incident that took place six months ago inside Hong Kong's Legislative Council where they tried to delay a controversial extradition bill.

The arrests relate to a committee meeting on May 11, when pro-Beijing politicians tried to install a pro-Beijing chairman to the committee that was examining the bill. It came after weeks of filibustering by the Democratic Party's James To.

The rivals camps tried to hold separate meetings in the same room, resulting in a melee. Four weeks later a million people took to the streets to protest the bill. It was abandoned by Hong Kong Chief Executive Carrie Lam in September after months of street protests.

Protesters set up barricades in Tseung Kwan O, Hong Kong, after a ceremony paying tribute to (Alex) Chow Tsz-lok on Friday night. Credit:Getty Images

On Friday night, as protesters mourned the death of a student who fell from a multistorey car park after police fired tear gas nearby, opposition party politician Chu Hoi-dick was arrested near his home.