Iran’s supreme leader, Ayatollah Ali Khamenei, vowed that Hezbollah leader Hassan Nasrallah’s death in an Israeli air strike “will not go unavenged,” declaring five days of mourning. An Iranian Revolutionary Guards general was also killed. Israel justified the strike, citing Nasrallah’s role in imminent attacks. The incident raises fears of regional war amid ongoing Israel-Hezbollah conflict. Khamenei has not yet promised retaliation, possibly to avoid war with Israel. He urged Muslim support for Hezbollah, emphasizing its role in the region’s future. Khamenei has been moved to a secure location.