Ayatollah Ali Khamenei has been killed on the first day of a massive US and Israeli air strikes on the country, US President Donald Trump has announced. Iran has not confirmed the death of the 86-year-old ruler of the past three decades - one of the longest in the world.

The US and Israel launched massive coordinated strikes on Iran, hitting nuclear and military targets in Tehran.

Meanwhile, a post was made from the Iranian Supreme Leader's social media account in Persian.