Iran’s supreme leader, Ayatollah Ali Khamenei, was killed Saturday in what U.S. officials say were coordinated U.S.-Israeli strikes, according to a U.S. source briefed on the operations and a social media announcement by President Trump. Khamenei was 86.
For 36 years Khamenei shaped Iran’s domestic politics and regional posture, consistently opposing the United States and Israel and resisting major internal reform. Born in July 1939 into a religious household in the Shia pilgrimage city of Mashhad, he trained in seminaries and emerged as an outspoken critic of the U.S.-backed Shah, enduring repeated arrests and working alongside figures such as Ayatollah Ruhollah Khomeini during the movement that toppled the monarchy in 1979.
Khamenei survived an assassination attempt in 1981 that left his right arm impaired. He later served as Iran’s president and, after Khomeini’s death, was elevated to supreme leader in 1989. Observers at the time described him as a relatively modest clerical figure who lacked the religious stature many expected in a successor. Analysts say he spent his early years in power consolidating authority and neutralizing rivals, a process aided by close ties with the Islamic Revolutionary Guard Corps (IRGC).
Those connections allowed Khamenei and the IRGC to extend influence into Iran’s economy and security apparatus. Critics argue the IRGC’s commercial reach enriched its leadership while contributing to economic grievances among ordinary Iranians. As supreme leader, Khamenei held ultimate authority over the military, foreign policy and the nuclear program, and he steered Iran toward a defensive posture that emphasized regional influence through allied militias and proxy groups.
Khamenei cultivated and backed organizations such as Hezbollah in Lebanon and Hamas in Gaza, and invested heavily in a ballistic missile program he viewed as a key deterrent. He also intervened directly in political life, most notably in the contested 2009 presidential election, where his backing of a preferred candidate helped spark broad protests that were later crushed. Human rights monitors and activist groups have blamed Iranian authorities for large-scale repression under his rule, including deadly crackdowns on dissent; some reports attribute thousands of deaths to state violence during waves of unrest, including an especially deadly series of protests beginning in late December 2025.
Foreign policy under Khamenei combined pragmatic negotiations with deep suspicion of the West. Secret talks that produced the 2015 Joint Comprehensive Plan of Action were permitted by the supreme leader, but he remained wary that concessions would invite pressure on other issues. The U.S. withdrawal from the nuclear deal in 2018 reinforced his distrust, and analysts say Iran accelerated enrichment activity afterward.
Tensions escalated into open confrontation in the mid-2020s. Israeli strikes on Iranian facilities and personnel in 2025, and a June 21, 2025 U.S. campaign against enrichment sites that Washington said had destroyed key infrastructure, marked a dramatic intensification. Israeli officials had warned they would move to neutralize Iran’s nuclear capabilities after a period of stalled diplomacy, and a series of strikes in 2025 targeted scientists, commanders and facilities. Commentators say Khamenei misjudged how far Israel and its allies were prepared to go to dismantle parts of Iran’s program.
Iran’s regional support network also eroded after a series of conflicts. The Oct. 7, 2023 Hamas assault on Israel, backed by elements of Iran’s network, set off a chain of events that included rocket exchanges, direct confrontations and retaliatory strikes across the region. Hezbollah suffered heavy losses in the follow-on fighting, and 2024 brought direct Israeli-Iran exchanges for the first time. Israeli attacks on weapons shipments in Syria coincided with the collapse of Syria’s leadership late in 2024 and early 2025, weakening a key theater for Iranian influence.
By the time of Khamenei’s death, analysts say many of Iran’s regional proxies and logistical networks had been degraded, its air defenses degraded by repeated strikes, and its nuclear infrastructure badly damaged. What persisted, however, was a substantial ballistic missile arsenal — a hallmark of Khamenei’s deterrence strategy.
The immediate political aftermath is uncertain. Khamenei’s death removes a centralizing figure who had for decades been the ultimate arbiter in Iran’s power structure, and it leaves open questions about succession and regime stability at a time when Iran’s regional reach and domestic institutions have been substantially strained.