A roadside bomb killed three Egyptian soldiers in the Sinai Peninsula on Monday, security sources said. The blast, which also wounded a soldier, comes days ahead of an investment conference in Sharm el-Sheikh resort, which Egypt hopes will project an image of stability and secure billions of dollars. The bomb targeted a military vehicle in Sinai, home to Egypt's most dangerous militant group, Sinai Province. Formerly known as Ansar Bayt al-Maqdis, it has pledged allegiance to Islamic State of Iraq and al-Sham.