Gunmen who killed 5 GIs were disguised

The gunmen who killed five U.S. troops in the Shiite holy city of Karbala wore military uniforms and used vehicles commonly driven by foreign dignitaries _ an apparent attempt to impersonate Americans, Iraqi officials said Sunday.

The local governor said the gunmen stormed into the provincial headquarters building during a U.S.-Iraqi meeting to discuss security measures ahead of the Shiite Ashoura festival.

Radical Shiite cleric Muqtada al-Sadr's parliamentary bloc, meanwhile, ended its nearly two-month political boycott after reaching a compromise over its demands for a timetable for Iraqi forces to take over security and the withdrawal of U.S. forces.

"We announce our return to parliament, we will attend today's session, and the ministers will resume their work to serve the people," Bahaa al-Araji, one of 30 lawmakers loyal to al-Sadr, said during a news conference attended by Sunni parliament speaker Mahmoud al-Mashhadani. Al-Sadr also has six loyalist ministers in the 38-member Cabinet.

The decision appeared to be a way for both sides to save face while allowing al-Sadr's bloc, whose support is crucial to Shiite Prime Minister Nouri al-Maliki, to regain legislative influence ahead of a planned U.S.-Iraqi security crackdown in Baghdad.

The first reinforcements of U.S. troops under the new Bush strategy already have started to flow into the Baghdad region. A brigade of the U.S. 82nd Airborne Division, part of the buildup, has arrived in Baghdad and its 3,200 soldiers will be ready to join the fresh drive to quell sectarian violence in the capital by the first of the month, the American military said Sunday.

In Karbala, provincial Gov. Akeel al-Khazaali, who was not at the security meeting, said the SUVs were able to get through a checkpoint on the outskirts of the city, 50 miles south of Baghdad, because police assumed it was a diplomatic convoy and informed headquarters that it was coming.

"The group used percussion bombs and broke into the building, killed five Americans and kidnapped two others, then fled," the governor said, adding that Iraqi troops later found one of the SUVs with three bodies dressed in military uniforms.

The U.S. military, which has said that five U.S. soldiers were killed and three were wounded while repelling the attack, denied that two U.S. troops were kidnapped.

Lt. Col. Christopher Garver, a military spokesman, said all American forces "were accounted for after the action."

A security official in Karbala, speaking on condition of anonymity because he was not authorized to disclose the information to the media, said the convoy of gunmen drove to Babil province after the attack. The Babil police commander confirmed that they entered the region before disappearing.

Although Babil province is predominantly Shiite, some parts of it, just south of Baghdad, are Sunni and insurgents are known to be active there.

The deaths of the U.S. troops, combined with a helicopter crash that killed 12 U.S. soldiers, made Saturday the deadliest day for U.S. forces in two years. It was also the third-highest of any single day since the war began in March 2003, eclipsed only by 37 U.S. deaths on Jan. 26, 2005, and 28 on the third day of the U.S. invasion. U.S. authorities also announced two American combat deaths from Friday.

The heavy toll comes at a critical time of rising congressional opposition to President Bush's decision to dispatch 21,500 additional soldiers to the conflict to try to curb sectarian slaughter.

The U.S. military statement about the Karbala attack said "an illegally armed militia group" attacked the provincial headquarters building with grenades, small arms and "indirect fire," which usually means mortars or rockets.

"A meeting was taking place at the time of the attack to ensure the security of Shiite pilgrims participating in the Ashoura commemorations," said a statement from Brig. Gen. Vincent K. Brooks, deputy commander of the Multi-National Division-Baghdad.

Thousands of Shiite pilgrims are flocking to the city to mark the 10-day Ashoura festival commemorating the death of one of Shiite Islam's most sacred saints, Imam Hussein, grandson of the Prophet Muhammad.

Brooks said Iraqi officials and security forces as well as U.S. troops were present at the meeting, but his statement did not mention other casualties from the attack. It said the headquarters had "been secured by coalition and Iraqi security forces."

In violence reported by police on Sunday:

_ A bomb left in a bag struck a small bus carrying people to work in a predominantly Shiite area in Baghdad, killing seven passengers and wounding 15.

_ A parked car bomb also exploded outside a restaurant in eastern Baghdad, killing one person and wounding five, according to police.

_ A suicide car bomber targeting an Iraqi army patrol killed one woman and wounded five other people in the northern city of Mosul.