Democracy activists Lee Cheuk-yan and Chow Hang-tung are on trial in Hong Kong under a Beijing-imposed national security law and face up to 10 years in jail. They previously led annual candlelight vigils on June 4 to commemorate the 1989 Tiananmen crackdown.

Hong Kong police detained seven people—aged 17 to 79—in Causeway Bay on Thursday, the 37th anniversary of the 1989 Tiananmen crackdown, at a site traditionally used for public commemorations. Officers stopped them on suspicion of disrupting order, continuing authorities' restriction of memorial activities.