Four suicide bombers kill at least 22 in Iraq on Sunday, as the death toll from Saturday's attack near a Shiite mosque rises above 90.

New suicide bombings killed at least 22 people in the Baghdad area on Sunday, while relatives struggled to identify charred bodies from a fiery suicide attack near a Shiite mosque in Musayyib that killed more than 90 people. The government raised the death toll from Saturday's attack in the town south of the Iraqi capital to "more than 90," making it the second deadliest single terrorist bombing since the overthrow of Saddam Hussein in April 2003. More than 150 people were wounded.

The head of Iraq's Special Tribunal, meanwhile, announced that the first criminal case has been filed against Saddam, stemming from the 1982 massacre of dozens of Shiite villagers in retaliation for a failed assassination attempt against the ousted leader.

The date for the trial of Saddam and three former aides will be determined in a few days. If convicted, they could face the death penalty.

The U.S. military also announced that two American soldiers died in separate attacks over the weekend. At least 1,767 members of the U.S. military have died since the Iraq war started in March 2003, according to an Associated Press count.

In Musayyib, 40 miles south of Baghdad, dazed survivors and relatives wept as they lifted blankets covering blackened bodies of victims from Saturday's attack in which a man detonated explosives strapped to his body in front of a Shiite mosque.

Mortar shells fell near the city's police station and hospital about five minutes after the blast, police Capt. Muthanna Khaled Ali said.

The huge explosion occurred as worshippers were heading to sunset prayers and the street was bustling with families enjoying a stroll in the cool of the evening.

One weeping man struck himself in the head as a sign of grief. Another sifted through debris near the molten remnants of a car. A woman shrouded in black screamed as she walked by the bombing site.

Later, several men carried wooden coffins on their shoulders, leaving the scene where nearly all building fronts had been damaged.

One charred shoe was left in the street, near a pool of dried blood mixed with ashes on the pavement. A blackened bicycle also lay abandoned close to a truck hitched to a fuel tanker that may have fed the blaze.

It appeared the bombing was directed at Shiite worshippers in the latest attack aimed at triggering sectarian war between Sunnis and Shiites.

The death toll in Saturday's attack was exceeded only by a Feb. 28 suicide car bombing in Hillah that killed 125, mostly Shiite police and National Guard recruits. An Aug. 29, 2003, car bomb outside a mosque in Najaf killed more than 85, but a definitive death toll was never released. There were suspicions it was much higher.

Iraqi President Jalal Talabani sent a message of condolence to the people of Musayyib. "After running out of their pretexts of resisting the occupation, the terrorists have been targeting religious places, children, oil and water facilities and Iraqi soldiers," read Talabani's message.

U.S. troops in Humvees and tanks also were at the scene Sunday morning, and a military spokesmen said a quick response unit had been dispatched shortly after the attacks. Tow trucks dragged the remnants of cars down the street while emergency workers hosed down hulls of vehicles.

Witnesses and police gave conflicting accounts of the bombing since many of those who were close by doubtless perished in the inferno. Most said a fuel tanker was moving slowly in the center of the town when the blast occurred, but a tanker truck in the area was mostly intact Sunday.

Zeyd Mohammed, 25, said a tanker truck filled with fuel detonated as it approached the mosque.

"The truck was moving when the suicide attacker detonated himself. He was targeting the mosque," Mohammed said.

Musayyib, on the Euphrates River, sits in the "triangle of death," an area so-named because of the large number of kidnappings and killings of Shiite Muslims traveling between Baghdad and the holy cities of Karbala and Najaf.

The violence Sunday started in the Iraqi capital with an attack on Iraqi police inspecting two bodies apparently left on the road by insurgents as a trap, the U.S. military said in a statement. Two policemen and one civilian were killed and eight people wounded in the eastern New Baghdad neighborhood.

About an hour later a second suicide car bomber hit a police convoy near the Bay'a bus station in southern Baghdad, killing three police commandos and four civilians, police Capt. Talib Thamir said. Three civilians also were wounded in that blast.

A third suicide car bomber missed a U.S. convoy but struck two minibuses, killing six civilians and wounding nine in Mahmoudiya, about 20 miles south of Baghdad, police Capt. Rashid al-Samarie said.

Another car bomber triggered an explosion outside the offices of Iraq's electoral commission in eastern Baghdad, killing five employees of Iraq's electoral commission and one policeman, according to police and officials.

The commission said in a statement that it "condemns this inhumane act and affirms its determination to continue the electoral process."

The announcement about the case against Saddam roughly corresponds to an indictment in the U.S. legal system, legal officials said. However, Saddam and the others will be considered "charged" when they appear in court.

Raid Juhi, chief judge of the Iraq Special Tribunal, said the preliminary investigation into the July 8, 1982, massacre in Dujail, 50 miles north of Baghdad, has been completed, and the case was referred to the courts for trial.

Iraqi officials previously have announced the imminent start of Saddam's trial before, only to have the proceedings delayed. The Americans privately have urged caution about rushing into a trial, saying Iraq must develop a judicial system first.

In other developments Sunday: