Members of Hong Kong's national security police unit visited the offices of prominent human rights lawyer Chow Hang-tung on Wednesday and informed her that the Hong Kong Alliance was under investigation. The alliance is a pro-democracy group that organised three decades of annual vigils commemorating the victims of Beijing's Tiananmen Square crackdown. Two of its leaders are currently in jail. Chow is a prominent lawyer and democracy activist who is part of the alliance. IMAGES