Relatives of Lebanese soldiers and policemen, who were captured by Islamist militants in Arsal, erect a tent and hold a banner depicting Lebanese soldier Ali al-Sayyed, who was beheaded by IS militants, during an open-ended sit-in demanding for the release of the remaining soldiers and pressuring the government to act in Martyrs' Square in downtown Beirut September 10, 2014. Islamic State militants have beheaded a captive Lebanese soldier, images published on social media showed on Saturday, the second Lebanese soldier to be killed in captivity by the group since it raided a Lebanese border town last month. The words under the banner read: "Lebanon's Martyr Ali' s camp". REUTERS/ Sharif Karim (LEBANON - Tags: POLITICS CIVIL UNREST)