US Major Wes Wright said US troops involved in the operation had made 109 arrests on Saturday and 84 the day before.
He also said a massive military presence was not apparent in the city because a protective ring had been thrown around it ahead of raids on "pinpoint targets."
Many insurgents are believed to be Iraqi Sunnis who lost power when US-led forces ousted Saddam Hussein in April 2003.
Almost 700 Iraqis were killed throughout the country in May, while Iraqi authorities have given a figure of nearly 900 insurgents detained and 28 killed in the continuing operation in Baghdad.
Although there has been an overall decrease in car bomb attacks in the capital over the last week, violence continued elsewhere with one person killed yesterday in an assassination attempt on a police chief near Baquba, north of Baghdad.
Saddam himself is expected to go on trial within two months, according to Iraqi Special Tribunal judge Raed Juhi, who told a newspaper Saturday that the toppled dictator's "morale is low because he realizes the volume of accusations for which he will be judged."
Saddam is being held by US forces at a base near Baghdad along with 11 former high-ranking regime members.
RSS