Former Iranian president, Mahmoud Ahmadinejad , was killed by American and Israeli attacks on Tehran.
This is reported by the Iranian Ilna agency and several Israeli media outlets.
Khamenei's death has sparked protests in Pakistan, where at least nine people were killed near the US consulate.
Hamas, Hezbollah, Iraq and Russia have expressed their condolences, condemning Khamenei's assassination.
Today at 5:00 PM, the Extraordinary Council on Foreign Affairs will be held, as Kaja Kallas said that this is a "decisive moment for Iran", while the future is "uncertain".
The International Atomic Energy Agency will hold an emergency meeting on Monday regarding the situation.
On Monday, the periodic session of the Board of Governors of the United Nations Atomic Agency will also begin in Vienna.