Mr Hammadi was head of production at the Syrian media collective, Eye on the Homeland. The Director-General of UNESCO, Irina Bokova, called on the Turkish authorities to ensure "swift justice" in tracking down the men's killers.
Mkurugenzi Mkuu wa shirika la Umoja wa Mataifa linalohusika na Elimu, Sayansi na Utamaduni UNESCO Irina Bokova, ametaka mamlaka husika kukomesha hali hiyo ambayo amedai kuwa inazidi kutishia uhai wa vyombo vya habari na waandishi wake.