TEHRAN (AP) – Iran’s supreme leader, Ayatollah Mojtaba Khamenei, urged rulers of Muslim nations to “know your real enemy, understand its plans and confront it,” and called the U.S. and Israel enemies of all Islamic nations, the official IRNA news agency reported.

Six months after the U.S. and Israel attacked Iran, killing Khamenei’s father and other senior leaders, Khamenei still has not been seen publicly. His comments came in a letter to religious leaders attending a conference in Tehran.

The war has exposed divisions in the Muslim world after Iran struck targets in neighboring Gulf Arab countries and restricted shipping through the Strait of Hormuz. Tehran has opposed the U.S. military presence in the region.