On 14 Feburary 2005, while living in Lebanon, Ziad Wasef Ramadan was questioned by Lebanese authorities in connection with the assassination of Rafiq Al-Hariri. After returning to live in Syria in 2005, he was summoned for questioning by the Syrian Political Security Department of Military Intelligence on 20 July 2005, where he was arrested and detained at the Palestinian Branch prison in Damascus, where he remains detained to date.