Libya's opposition leader has said rebels captured a third son of Gaddafi.
Mustafa Abdel-Jalil al-Saadi Gaddafi was held on Sunday night along with his brother Saif al-Islam.
Gaddafi’s sons and a daughter have all played roles in their father’s regime, some in diplomatic or business roles.
Al-Saadi and his brothers Mutassim and Khamis all headed military brigades.