The U.S. and Israel have launched major attacks on Iran, whose state media say Supreme Leader Ayatollah Ali Khamenei is dead.

People in the UK, Spain and the United States celebrated on Saturday following news that Iran's Supreme Leader Ali Khamenei had been killed during attacks across Iran by Israel and the US, which began on Saturday morning local time. The death of the 86-year-old ruler of the past three decades was later confirmed on Iranian state TV.

Khamenei assumed power following the death of Ayatollah Ruhollah Khomeini in 1989, inheriting a revolutionary state still consolidating itself.

Saturday’s military operation against Iran shows the dramatic evolution in risk tolerance that President Donald Trump has made in a matter of months.

Operation Epic Fury sparked swift reaction from lawmakers in Pennsylvania, New Jersey and Delaware.

Donald Trump says supreme leader Ayatollah Ali Khamenei killed in joint US-Israeli operation

The United States and Israel have clashed with Iran at an emergency meeting of the U.N. Security Council, where the U.N. chief and many countries urged a halt to their attacks and a return to negotiations.

The president said the strikes have put immense pressure on Iran, and he believes the U.S.-Israeli military action can lead to an eventual diplomatic solution.