ISIS' second-in-command, Abu Muhammad al-Adnani, is dead, according to the media arm of the terrorist organization, NBC News reported.
The circumstances of Abu Muhammad al-Adnani's death in Aleppo, Syria, have not been confirmed. Officials in Washington — who had put out a $5 million reward for al-Adnani — had no immediate comment.
The 37-year-old Syrian, who was ISIS' director of external investigations and main spokesman, is best known for issuing an edict for lone wolves to kill Westerners in September 2014.
U.S. & World
He was at the top of the U.S. government's kill list of ISIS leaders, senior American military and intelligence officials told NBC News in December. The U.S. wanted al-Adnani dead because he was considered the author of the strategy of wanton murder that has left more than 500 dead in attacks around the world since October 10 — and apparently helped inspire last year's massacre in San Bernardino.