Iran's Supreme Leader, Ayatollah Ali Khamenei, has been killed following massive air strikes by the United States and Israel. The Iranian President has vowed revenge for the leader's death.

• Ayatollah Ali Khamenei, Iran's Supreme Leader for the past three decades, was killed on Sunday morning.
• Key entities involved include Iran, the United States, and Israel.
• The strikes reportedly targeted Iran's ballistic missile and air defence systems, and Khamenei's death has been declared a martyrdom, initiating 40 days of nationwide mourning.