Hong Kong police arrested more than 10 people on Wednesday morning, in-cluding two opposition lawmakers Lam Cheuk Ting and Ted Hui Chi-fung.
Lam was taken away by police at his home on suspicion of participating in riots on July 21 last year and for conspiracy with others to destroy property and obstruction of justice outside the Tuen Mun Police Station.
Hui was also taken away by police on Wednesday morning.
Hong Kong's TVB said in addition to those two, at least 10 other people had been arrested by police from the New Territories.
Following the arrest of Jimmy Lai Chee-ying, one of the most high-profile local secessionists, observers said this has delivered a heavy blow to local rioting forces.