And so it begins.
Beijing Secret Police are now arresting people under the nefarious "National Security Law".
Urgent response needed from @DominicRaab@UKinHongKong
Activist Fleco Mo Kai-hong, in a post on Facebook, says Tony Chung of the now disbanded Studentlocalism group has been arrested for violating the state security law. Few details at the moment, no official announcement, seems like it will be a developing story through the night.