(Agencies)
Updated: 2007-12-07 23:03

Friday's explosion occurred on the outskirts of Muqdadiyah, a majority Sunni city about 60 miles north of Baghdad, on a road leading to the town market, al-Tamimi said.

Meanwhile, a suicide car bombing at a checkpoint in the Mansouriayah area, 20 miles east of the provincial capital of Baqouba, killed seven Iraqi soldiers and three members of a local anti-al-Qaida group, according to an Iraqi army officer, who spoke on condition of anonymity because he was not authorized to release details.

Although violence has declined nationwide, it is still frequent in the north, where al-Qaida in Iraq militants and other extremists are believed to have fled a US-led security crackdown that began in mid-February in Baghdad.

As the influx of US troops gained momentum earlier this year, American officials have courted both Sunni and Shiite tribal leaders around the country, hoping they will help lead local drives against al-Qaida and other militants. A similar effort saw some success in Iraq's westernmost province, Anbar, where Sunni tribes rose against the organization's brutality and austere version of Islam.

The groups now include some 60,000 Iraqis nationwide, most of them Sunni Arabs, according to the US military, and members have come under increasing attack from militants trying to offset recent security gains.

Since the groups began forming in Diyala in July, many of their members have faced deadly militant strikes. In Baqouba, at least 13 have died in suicide attacks, roadside bombings shootings, according to records compiled from local police.

With overall violence on the decline, the United States has pushed Iraq's government to make strides in reconciling Sunni Arabs, Shiites and Kurds -- a step seen as key to keeping the peace in the country.

A stumbling block in recent days has been a dispute over raids on the home and offices of Adnan al-Dulaimi, one of Iraq's most powerful Sunni politicians that led to the arrest of his security detail, after a guard was found with the keys to an explosives-rigged car.

He accused the Shiite-led government of trying to silence a pro-Sunni voice by putting him under virtual house arrest. The government says he was being protected because he no longer had bodyguards. Al-Dulaimi was kept under guard for three days following the raid last Thursday night, then shifted to a hotel in the fortified Green Zone.

He returned home Friday and said the Iraqi military sent Humvees along with him.

"I do not need protection, and I think that these vehicles were meant to put me under observation rather than protecting me," he told The Associated Press.

During a sermon Friday at Baghdad's main Sunni mosque, Sheik Jamal al-Obeidi said the dispute over al-Dulaimi pointed to a broader problem: "Iraq's government talks publicly about national reconciliation, but in reality we do not find this reconciliation."

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