Late Wednesday, Prime Minister Nouri al-Maliki ordered the arrest of the Iraqi army colonel who was in charge of security in the area around the Sadriyah market where at least 127 people died and 148 were wounded in one of the bombings.
With streets and bodies blown apart and death all around, it's impossible to imagine that the bomb site was once the crowded Sadriyah market, reports CBS News reporter Martin Seemungal.
It was one of 5 deadly bombings in Baghdad in less than 8 hours, most in Shiite areas.
Nationwide, the number of people killed or found dead on Wednesday was 233, which equaled the highest death toll since The Associated Press began recording daily nationwide deaths in May 2005.
U.S. Defense Secretary Robert Gates called the bombings "horrifying" and accused al Qaeda of being behind them.
The market is situated on a side street lined with shops and vendors selling produce, meat and other staples. It is also about 500 yards from a Sunni shrine.
About an hour earlier, a suicide car bomber crashed into an Iraqi police checkpoint at an entrance to Sadr City, the capital's biggest Shiite Muslim neighborhood and a stronghold for the militia led by radical anti-U.S. cleric Muqtada al-Sadr.
The explosion killed at least 41 people, including five Iraqi security officers, and wounded 76, police and hospital officials said.
Black smoke billowed from a jumble of at least eight incinerated vehicles that were in a jam of cars stopped at the checkpoint. Bystanders scrambled over twisted metal to drag victims from the smoldering wreckage as Iraqi guards staggered around stunned.
Earlier, a parked car exploded near a private hospital in the central neighborhood of Karradah, killing 11 people and wounding 13, police said. The blast damaged the Abdul-Majid hospital and other nearby buildings.
The fourth explosion was from a bomb left on a minibus in the central Rusafi area, area, killing four people and wounding six others, police said.
In other developments:
U.S. officials had cited a slight decrease in sectarian killings in Baghdad since the U.S.-Iraqi crackdown was launched Feb. 14. But the past week has seen several spectacular attacks on the capital, including a suicide bombing inside parliament and a powerful blast that collapsed a landmark bridge across the Tigris River.
In Israel, Gates said the military had anticipated that al Qaeda terrorists and other insurgents "would attempt to increase the violence in order to make the plan a failure or to make the people of Iraq believe the plan is a failure."
"Obviously the level of fatalities today is a horrifying thing. But I think it illustrates another point: These terrorists are killing innocent men, women and children who are Iraqis. They're killing their countrymen," he said at a news conference in Tel Aviv with his Israeli counterpart, Amir Peretz.
Meanwhile, to the west of the city, U.S. troops killed five suspected insurgents and captured 30 others in a raid in Anbar province, a day after police uncovered 17 decomposing corpses beneath two school yards in the provincial capital.
The raid took place early Wednesday near Karmah, a town northeast of Fallujah in Anbar, which has been a stronghold for Sunni insurgents.
American forces raided a group of buildings suspected of being used by militants and found explosives inside one of them, the military said in a statement. A helicopter was called in and dropped precision-guided bombs on the buildings, it said.
The soldiers came under fire and shot back, killing five Iraqis and wounding four others, the statement said. The wounded were taken to a military hospital and remained in U.S. custody. Twenty-six other people were detained as well, the military said.
The bodies found a day earlier at school yards in Ramadi, Anbar's provincial capital, were discovered after students and teachers returned to the schools a week ago and noticed an increasingly putrid odor and stray dogs digging in the area, police Maj. Laith al-Dulaimi said.
Ramadi had been a stronghold of Sunni insurgents and al Qaeda fighters until recently, when U.S. forces in the region and the Iraqi government successfully negotiated with many local tribal leaders to split them off from the more militant insurgent groups.