(nbcnews) -- Posts on ISIS forums in the "deep web" say Turki al-Binali, 32, was killed Monday.
Alex Kassirer of Flashpoint Intelligence, which tracks ISIS social media for NBC News, reports that Tekfiris "are posting a lot of photos of him and eulogizing him (many referring to him by his kunya (battle name), Abu Sufyan al-Sulami)."
Many of the social media posts carried an Arabic hashtag that translates into "the martyrdom of Sheikh Turki al-Binali."
Senior ISIS leader Turki al-Binali
Flashpoint also pointed to the local Raqqa website "Raqqa Is Being Slaughtered Silently," which is run by opponents of ISIS and the Syrian government, that stated al-Binali was killed on Monday evening after "his vehicle was targeted" on "Al-Wadi street in central Raqqa."
The Pentagon declined to comment on whether al-Binali had been killed. A senior U.S. intelligence official did not dispute the reports of al-Binali's death.
ISIS has carried out military campaigns against a variety of minority Muslim and other sects, including the Yazidi minority in Iraq, which was followed by wholesale enslavement of Yazidi women and girls.
More than 3,000 women and girls were taken captive when ISIS attacked ancestral Yazidi villages around northwestern Iraq's Sinjar Mountain in August 2014.
Al-Binali was at the time reportedly head of the ISIS Research and Fatwa Department, which released a fatwa allowing rape of infidel women around the time of the campaign against the Yazidis and their subsequent enslavement.