Iraqis on Wednesday joyously welcomed US marines driving through eastern Baghdad even as looters had a free run of government buildings with the collapse of President Saddam Hussein's authority.
Hundreds of jubilant Iraqis cheered, danced, waved and threw flowers as marines advanced through eastern Baghdad and into the centre of Saddam's seat of power.
Reuters correspondent Sean Maguire said crowds mobbed a marine convoy as it drove from the suburbs to the Martyr's Monument, just 3km east of the central Jumhuriya bridge over the Tigris River.
"These are quite extraordinary scenes," he said after a morning drive through the rundown sprawl of the Shi'ite Muslim-dominated Saddam City and then the more prosperous, leafy districts.
Thousands of US troops moved towards the centre of the Iraqi capital overnight from the west, northeast and south, meeting little resistance.
Residents woke to the sound of birds chirping and only occasional shooting after one of calmest nights since the war began on March 20.
There were no signs of Iraqi police or troops on the main streets. Information Ministry officials, who have shadowed reporters through the conflict, were nowhere to be seen.
Looters were quick to take advantage. Reuters Television crews watched cheering crowds ransack the UN headquarters in the Canal Hotel to the east and drive off in UN cars.
Another witness saw looters raid sports shops around the bombed headquarters of the Iraqi Olympic Committee, headed by Saddam's elder son, Uday, who also leads the Fedayeen militia.
US forces moved into the sprawling, poor Shi'ite suburb of Saddam City in the northeast, home to at least two million people, on Wednesday morning.
"I don't think I heard a single shot being fired," said Maguire, who accompanied the marines into Saddam City.
There was little sign