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These dramatic images show apparent mass execution of Iraqi soldiers by ISIS

WARNING: Graphic images below.

On Sunday, militants from the Islamic State of Iraq and Syria (ISIS) posted a set of gruesome images online that purported to show them executing dozens of men, apparently from the Iraqi army, in Salahuddin province, north of Baghdad.

As my colleagues Liz Sly and Abby Hauslohner reported, some of the photos showed men in civilian clothes lying with their face down, shoulder to shoulder and with their hands bound, in a ditch surrounded by yellow fields, as a row of masked fighters fired into the ditch. Photographs taken before the execution show the men said to be Iraqi soldiers lining up before they are piled onto pickup trucks and then led to an open field. A report in the New York Times says the group boasted on Twitter that it had killed as many as 1,700 soldiers, which, if true, would make Sunday's execution one of the worst atrocities in the region in the past few years.

According to the Associated Press, the images were posted on the jihadist Web site Welayat Salahuddin by ISIS and their authenticity was confirmed by Iraq's top military spokesman, Lt. Gen. Qassim al-Moussawi, who said he was aware of cases of mass murder of Iraqi soldiers.

See the images below:

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