A Hong Kong court found three prominent pro-democracy activists guilty of unauthorized assembly charges over a June 4 vigil commemorating the crackdown on protesters in and around Beijing's Tiananmen Square in 1989.

The ruling against media tycoon Jimmy Lai, barrister Chow Hang Tung and former opposition politician Gwyneth Ho is the latest blow to the city's democracy movement, which has seen scores of activists arrested, jailed or flee the Chinese-ruled territory since Beijing imposed a sweeping national security law last year.