TEHRAN, Jan. 8 (Xinhua) -- Iran's Supreme Leader Ayatollah Ali Khamenei on Wednesday called on the United States to pull its forces out of region, hours after Iran launched missile attacks on two U.S. military bases in Iraq.

Khamenei referred to Iran's missile strike on the U.S. bases, saying that "they were slapped" on the face.

However, "military operations of this kind is not enough," and "what is important is to put an end to the corruptive presence of the Americans in the region," he said.