U.S. coalition forces took out another major ISIS commander this month: Haji Imam, a senior religious leader of the self-proclaimed Islamic State in an operation inside Syria, according to a top defense official.

Defense Secretary Ash Carter, flanked by Chairman of the Joint Chiefs Gen. Joseph Dunford, will announce the operation Friday morning, the official said, speaking anonymously to describe the coalition’s operations.

Haji Imam’s real name is said to be And ar-Rahman Mustafa al-Qaduli. He was considered in line to be second in command for ISIS, though some ISIS watchers say his Turkoman background ruled that out.