A U.S.-Israel strike killed Iran's Supreme Leader, sparking mourning, retaliation threats, and regional tension.

A red "flag of revenge" was raised over Iran's Jamkaran Mosque in Qom following reports that a joint U.S.-Israel strike killed Supreme Leader Ayatollah Ali Khamenei, triggering national mourning and vows of retaliation. Iran confirmed his death, labeling it a terrorist act, while its leadership pledged a strong response. U.S. and Israeli officials defended the strike, citing Khamenei as a major threat, with President Trump praising the outcome. Iran established an interim leadership council, and regional tensions escalated, with protests in multiple countries and conflicting signals on de-escalation.