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Dozens killed in Baghdad attacks
Gunmen in the Iraqi capital Baghdad have killed at least 40 people at a fake police checkpoint, in an apparent sectarian attack against Sunni Muslims.
Police say Shia militants stopped cars in the western Jihad district, separated Sunnis and shot them.
Later, at least 25 people died when two car bombs exploded near a Shia mosque in the capital, police said.
There has been an upsurge in sectarian violence in Iraq in recent months, raising fears of a civil war.
Sunni Arabs say government-backed Shia militias are behind many of the attacks. But officials have denied any involvement.
The BBC's Jonny Dymond in Baghdad says the style and scale of Sunday morning's incident was breathtaking.
Witnesses said Shia militiamen entered Jihad and set up roadblocks.
Drivers were reportedly pulled from their cars and their identity cards inspected.
Any Sunni Muslims identified were then separated from the rest and killed.
"They also went into certain Sunni houses and killed everyone inside," said a witness quoted by AFP news agency.
Call for calm
Another told the Associated Press news agency: "They came and started shooting. One of my relatives tried to help but was also shot while doing so. What crime have my people committed, I ask?"
Officials say they are getting reports of drive-by shootings in the area, and the number of deaths is expected to rise.