The first reports of explosions in the Iranian capital Tehran came shortly after 7 a.m. local time in Sweden. Israel announced that the country had launched a "preemptive strike."
Just over an hour later, Iranian media reported that the attacks were nationwide. Iran and Israel were closing their respective airspaces, and in Iran the mobile network was reportedly down.
At 8:30 a.m. local time in Sweden, US President Donald Trump announced that the United States was participating in the attack. He described a "massive combat operation" with the aim of crushing Iran militarily and called on the Iranian people to overthrow the regime and take control of the country.
Shortly after 9 a.m., reports of explosions were heard in northern Israel. Prime Minister Benjamin Netanyahu said in a statement that the aim of the attack on Iran was to neutralize an "existential threat."
The Iran-backed Houthi movement in Yemen announced that it would resume its attacks on shipping in the Red Sea.
Shortly before 10 a.m., Iran's Revolutionary Guards announced that they had fired "the first wave" of drones and rockets at Israel. Shortly afterward, Bahrain reported that a U.S. naval base in the country had been targeted by a missile attack, which was confirmed by the Revolutionary Guards.
Saudi Arabia, the United Arab Emirates, Qatar, Jordan and Kuwait - all of which host American bases - also reported that they had been attacked and that they had shot down missiles in their airspace.
In Iraq, at least two people were reported to have been killed in a drone attack against the pro-Iranian Shia militia Hezbollah Brigades.
A number of international airlines, including Air France, Air India, Norwegian, Swiss and Turkish Airlines - announced that they were canceling flights to destinations in the Middle East.
The Israeli military said it had attacked hundreds of military targets. Iranians in or near military infrastructure were being urged to evacuate.
The EU announced that it was withdrawing all non-essential personnel from the Middle East, citing the "dangerous" situation.
Iranian state media reported that at least 85 people, many of them students, were killed when a girls' school was hit in an Israeli attack.
According to the Iranian Red Crescent, around 200 people in Iran had been killed and 700 injured around the country in the American and Israeli attacks.
Late Saturday evening, US President Donald Trump announced that Iran's supreme leader, Ayatollah Ali Khamenei, had been killed.
The Israeli military claimed that Mohammad Pakpour, leader of Iran's Revolutionary Guard, and Defense Minister Aziz Nasirzadeh had also been killed in the American and Israeli attacks.
