Tehran: Ayatollah Ali Khamenei, who assembled theocratic power in Iran over the decades as its supreme leader and sought to turn it into a regional powerhouse, bringing it into confrontation with Israel and the United States over its nuclear program while crushing democracy protesters at home, has died. He was 86.

Iranian state media reported the death early Sunday, after a major attack launched by Israel and the United States. U.S. President Donald Trump said hours earlier that Khamenei had been killed in the joint operation.

Khamenei dramatically remolded the Islamic Republic since he took the reins after the death of Ayatollah Ruhollah Khomeini in 1989. Khomeini was the fiery, charismatic ideologue who led the overthrow of the shah and installed rule by Shiite Muslim clerics tasked with spreading religious purity. It fell to Khamenei, a stodgier figure with weaker religious credentials and a leaden demeanor, to turn that revolutionary vision into a state establishment.

He ended up ruling far longer than Khomeini. He greatly expanded the Shiite clerical class and built the paramilitary Revolutionary Guard into the most important body underpinning his rule. The Guard became a military and business behemoth, the country’s most elite force and head of its ballistic missile arsenal, with hands across Iran’s economic sectors.