ISIS-affiliated Amaq Agency announced the death of senior leader Abu Muhammad al-Adnani Tuesday.

An ISIS-affiliated media group announced the death of senior leader Abu Muhammad al-Adnani on Tuesday.

Islamic State Media

In a statement to Amaq Agency, an ISIS military source said that al-Adnani "was martyred while surveying the operations to repel the military campaigns against Aleppo."

Abu Muhammad al-Adnani, the chosen name of Taha Subhi Falaha, was one of ISIS's first and most visible members, reportedly serving as the group's leader within Syria. Al-Adnani also served as the group's spokesman, delivering multiple addresses on behalf of the militants.

Al-Adnani reportedly was killed in al-Bab, within Aleppo province, where the US-led coalition is currently conducting airstrikes.

BuzzFeed News has reached out to CENTCOM, the Department of Defense, and the White House to confirm a-Adnani's death.