We're at war

[Keyser Soze]

WASHINGTON (CNN) -- Several large explosions rocked the Iraqi capital at about 9 p.m. Thursday (1 p.m. EST). At the same time, Pentagon sources said elements of the 1st Marine Expeditionary Force was moving into Iraq from the southeastern border with Kuwait.

CNN's Nic Robertson on the scene reported that black smoke could be seen rising from at least three locations around Baghdad. Air raid sirens sounded briefly, about 20 minutes before the blasts, followed a few minutes later by flashes of anti-aircraft fire that lit the night sky.