Riot police clash with demonstrators who had gathered in a show of support for gunmen holding several hostages in a police station in Yerevan, Armenia, July 20, 2016. Picture taken July 20, 2016. Hrant Khachatryan/PAN Photo/Handout via REUTERS

Riot police clash with demonstrators who had gathered in a show of support for gunmen holding several hostages in a police station in Yerevan, Armenia, July 20, 2016. Picture taken July 20, 2016. Hrant Khachatryan/PAN Photo/Handout via REUTERS

Riot police clash with demonstrators who had gathered in a show of support for gunmen holding several hostages in a police station in Yerevan, Armenia, July 20, 2016. Picture taken July 20, 2016. Hrant Khachatryan/PAN Photo/Handout via REUTERS

July 26, 2016 12:20 AM (UTC+8)