Alwani, a Sunni, thinks the Shiite-led government is deliberately shafting Fallujah for sectarian reasons.
Batarical Hatashmi(ph), one of the Sunni leaders, insists it was nothing more than a courtesy call.
American officials had been hoping that Sunni Muslims would get some role in Iraq's new government.
But the chances of Sunni participation have been complicated by a split in Sunni ranks.
Mutlaq heads the National Dialogue Council, one of several Sunni-based groups that fielded candidates in the election.
Several people were killed on Friday in bomb attacks on two Sunni mosques in Baghdad.
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Indeed, Maliki reportedly plans to postpone local elections in the Sunni-majority provinces of Anbar and Ninevah.
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He lost his left hand in a suicide attack in the predominantly Sunni province in 2009.
It's one of the areas where the Sunni-led insurgency has been at its most persistent.
This has been a trouble spot, is that right, in the Sunni triangle for some time?
Sunni militants, including al-Qaida, have long targeted Iraq's Shiite majority and government security forces.
The Shia-Sunni fault line, with Syria currently at its epicentre, is certainly contributing, he notes.
So far Dr Jaafari has given little sign of wanting to accommodate the Sunni insurgency.
The Iraqi Islamic Party, Mr Allawi's main Sunni Arab partner, said it would leave the government.
The attack has prompted many Sunni Arabs to rush to distance themselves from Mr Allawi.
Twenty-three activists have been charged with forming a "terror network" aimed at toppling the Sunni leadership.
The regime has ethnically cleansed several Sunni-majority villages on routes that lead to the coast.
Both the government and al-Azhar, the Sunni Muslim world's highest authority, condemned the incident.
This achievement reverberated beyond Iran, inspiring even the country's natural enemies in the Arab Sunni world.
The al-Iraqiyya group, the main Sunni bloc in parliament, is boycotting the assembly in protest.
The entire al-Iraqiyya group, the main Sunni bloc in parliament, is boycotting the assembly in protest.
It's one of the last Sunni islands on the east side of the river.
Recently his aides met with Sunni Arab tribal leaders who have turned on al-Qaida.
It was Americans who raided a bunker last November where police were torturing Sunni detainees.
Some in Tripoli fought with Iraq's Sunni insurgents and came back to Lebanon to recruit others.
The US relationship with Iraq's Sunni Arabs has evolved since the invasion of 2003.
Al-Ahmar makes some Western officials nervous because of his links with radical Sunni Islamists.
As a first step, the U.S. is recruiting Sunni volunteers in Sunni and mixed neighborhoods.
The government says religious harmony is strong in Indonesia, which has a large Sunni Muslim majority.
Brig Gen Wissam al-Hassan was viewed as one of the leading Sunni figures in Lebanon.
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