US President Donald Trump has called for regime change in Iran and said "major combat operations" are under way.

Trump describes Khamenei as "one of the most evil people in history", reiterates his call for the Iranian people to "take back their country", and says the bombing of Iran will continue.

The US and Israel have launched a large-scale attack on Iran, in what President Trump says is an opportunity for Iranians to "take back their country".