A medical source at a mortuary in Ramadi confirmed the death toll, but said that 11 people -- six women and five men -- were wounded in the attack.
A lieutenant colonel in the Ramadi police said there were around 40 Lebanese Shiite pilgrims on the bus, among them women and children, who were headed to Shiite holy sites.
Iraq is home to some of the holiest sites in Shiite Islam, to which hundreds of thousands of pilgrims flock each year. Pilgrims are periodically attacked, often with bombs.
Brutal sectarian fighting tore across Iraq beginning in 2006, leaving tens of thousands of people dead.
While the violence was brought under control by a US troop surge and by Sunni tribesmen switching sides to fight against insurgents, sectarian tensions in Iraq remain high.
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A lieutenant colonel in the Ramadi police said there were around 40 Lebanese Shiite pilgrims on the bus, among them women and children, who were headed to Shiite holy sites.
Iraq is home to some of the holiest sites in Shiite Islam, to which hundreds of thousands of pilgrims flock each year. Pilgrims are periodically attacked, often with bombs.
Brutal sectarian fighting tore across Iraq beginning in 2006, leaving tens of thousands of people dead.
While the violence was brought under control by a US troop surge and by Sunni tribesmen switching sides to fight against insurgents, sectarian tensions in Iraq remain high.
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