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CBS News has learned that the Pentagon now believes, based on initial assessments, that a top commander of the Islamic State of Iraq and Syria (ISIS) known as "Omar the Chechen," or Omar al-Shishani, ...

Two U.S. officials told CNN that the Obama administration has assessed that ISIS senior operative Omar al-Shishani is dead. The officials said he was injured in a U.S. airstrike last week and then ...

BEIRUT – An Islamic State-run media outlet says Omar al-Shishani, one of the group's top military commanders, has been killed in fighting near the Iraqi city of Mosul. U.S. and Iraqi officials, as ...

BAGHDAD — Top Islamic State commander and feared ethnic Chechen jihadi fighter Omar al-Shishani has died of wounds suffered in a U.S. airstrike in Syria, a senior Iraqi intelligence official and the ...

WASHINGTON – A red-bearded Islamic State commander described by American officials as the group’s de facto minister of war may have been killed in an air strike in Syria on Friday by the U.S.-led ...

Although there was a flurry of media attention in October and November focusing on Umar al-Shishani, Islamic State's military commander in Syria, he has been conspicuously absent from the scene in ...

Islamic State senior operative Omar al-Shishani is believed to be dead after an air strike several days ago in northern Syria, the Department of Defense confirmed to USA TODAY Monday night. “We assess ...

Shishani’s presence in southern Salahaddin/eastern Anbar has been highlighted in Iraqi press reporting, which noted that he personally assumed command of ISIL fighters in the vicinity of Duluiyah. In ...