Iran's top authority, Supreme Leader Ayatollah Ali Khamenei, has replaced the head of the influential Revolutionary Guard, state TV reported on Sunday, days after the United States designated the elite group a foreign terrorist organization.

The TV station did not give a reason for the change when it announced the appointment of Brig. Gen. Hossein Salami to the position.

"The Supreme Leader has appointed Salami as the new commander-in-chief of the Guard, who will replace Mohammad Ali Jafari," it said.