Eido was assassinated just three days after the UN Security Council Resolution 1757 came into effect, mandating the establishment of a hybrid Lebanese-international tribunal to investigate suspects of the Hariri assassination and other similar attacks. He was the seventh anti-Syrian politician and third member of the Lebanese parliament killed since the assassination of Rafik Hariri on 14 February 2005. The death of Walid Eido reduced then March 14 alliance's parliamentary majority to 68 out of 126 MPs total. The assassination was condemned by the UN Security Council.