IS spokesman and head of external operations Abu Muhammad al-Adnani is pictured in this undated handout photo, courtesy the U.S. Department of State. The United States carried out an air strike in Syria's town of al-Bab targeting a senior Islamic State official, a U.S. defense official told Reuters on August 30, 2016. U.S. Department of State/REUTERS ATTENTION EDITORS - THIS IMAGE WAS PROVIDED BY A THIRD PARTY. EDITORIAL USE ONLY - RTX2NNYQ

WASHINGTON (Reuters) - The Pentagon confirmed on Monday that Islamic State leader Abu Muhammad al-Adnani was killed in a U.S. air strike on Aug. 30 in Syria.

The United States had said on Aug. 30 that Adnani had been targeted in a strike, but it stopped short of confirming his death. Russia’s Defense Ministry said on Aug. 31 that a Russian air strike had killed Adnani.