Early on Sunday, a series of 10 or 12 rockets or mortars were fired into the Green Zone one - home of the Iraqi government HQ, the US and UK embassies, and thousands of American troops - at about 0600 (0300 GMT). As the barrage hit the Green Zone, the US public address system warned people "to duck and cover" and to stay away from windows The barrage of rocket or mortar fire sounded like successive peals of thunder in an audio recording of the attack Security in Iraq has improved overall since last June, when the US deployed an extra 30,000 troops in violence-hit areas. But our correspondent says the number of high-profile attacks has been creeping back upwards in recent months.
