A large explosion has shaken the Iraqi capital. Witnesses report seeing bodies, but officials haven't confirmed casualties. Gunfire was heard after the blast, and people fled from the area. Iraqi police and US soldiers are on the scene. Heavy smoke is rising from behind a public square in central Baghdad. The square is where a bronze statue of Saddam Hussein was toppled during the US-led invasion. The blast also shook a nearby hotel where many foreign contractors and journalists are based. The area where the explosion was heard has a mix of residential and commercial buildings.