A senior member of the Islamic State, Abu Mohammed al-Adnani, born Taha Sobhi Flaha in Syria, serves as the group’s official spokesman.
The department also labeled Said Arif, an Algerian-born extremist operating in Syria, a terrorist. Arif is wanted by the French government after fleeing house arrest in France in October 2013 and joining the terrorist group al-Nusra Front, al Qaeda’s Syrian wing.
The new designations come as U.S. is launching airstrikes to assist Iraqi and Kurdish forces in taking back control of the country’s largest dam from the Islamic State, which it captured it two weeks ago.
The actions bar Americans from doing business with either man and freeze all property they have under U.S. jurisdiction. It comes after the U.N. Security Council unanimously adopted a resolution on Friday aimed at preventing the financing of both the Islamic State and the al-Nusra Front.