Past attacks inside the Green Zone include:

— On Oct. 14, 2004, twin bombings struck a cafe and an open market inside the Green Zone, killing six people, including four Americans, and wounding nearly 30.

— On Nov. 25, 2004, a mortar attack killed four employees of a British security firm and wounded at least 12 in the Green Zone. Britain's Foreign Office said the four security workers for London-based Global Risk Strategies were former Gurkhas, renowned Nepalese soldiers.

— On Jan. 29, 2005, insurgents hit the U.S. Embassy in Baghdad with a rocket, killing two Americans — a civilian and a Navy sailor — on the eve of landmark elections. The rocket hit the embassy compound after nightfall, near the building itself. Four other Americans were wounded.

— On Oct. 14, 2004, twin bombings struck a cafe and an open market inside the Green Zone, killing six people and injuring nearly 30.