Mojtaba Khamenei, a son of Iran's late supreme leader, has been named his successor, Iranian state TV announced early on Monday, as the war that began a little over a week ago with his father's killing took a dramatic turn.
The younger Khamenei, who had not been seen or heard from publicly since the war started, had long been considered a contender for the post, even before an Israeli strike killed Ayatollah Ali Khamenei, and despite never being elected or appointed to a government position.
His appointment came after signs of a rift among Iranian officials as the country awaited a decision by the Assembly of Experts, a group of clerics that selects the supreme leader. State TV read a statement from the assembly, saying he was selected based on "strong" votes and urging the nation to unite behind him. The station broadcast scenes of people celebrating in parts of Tehran.
There has been only one other transfer of power in the office of supreme leader since the Islamic Revolution almost a half-century ago.
A secretive figure, the 56-year-old Khamenei now stands at the heart of Iran's theocracy and will have final say over all matters of state. He will serve as commander-in-chief of the military and powerful paramilitary Revolutionary Guard. He also has authority over a stockpile of highly-enriched uranium that could be used to build a nuclear weapon, if he chooses to decree it.
The selection of Khamenei faces the likelihood of US criticism. "Khamenei's son is unacceptable to me," US President Donald Trump has said. "We want someone that will bring harmony and peace to Iran."
The White House did not immediately respond to a request for comment. Trump told ABC News on Sunday he wants a say in who comes to power once the war is over; a new leader "is not going to last long" without his approval.
But Iran's Revolutionary Guard issued a statement expressing support, as did the Iran-backed Lebanese militant group Hezbollah.
Top Iranian security official Ali Larijani, speaking to state TV, praised the Assembly of Experts for "courageously" convening even as airstrikes continued in Tehran. He said the younger Khamenei had been trained by his father and "can handle this situation".
Regional anger grows and oil rises above USD 100 a barrel
The war's toll on civilian targets grew as Bahrain accused Iran of striking a desalination plant vital to drinking water supplies, and oil depots in Tehran smoldered following overnight Israeli strikes.
As the war impedes the region's oil production and shipping, crude prices have surpassed USD 100 per barrel for the first time in more than three-and-a-half years. Some regional producers, including in Iraq, have curbed output amid dangers in the Strait of Hormuz.
In a sign of rising regional anger, the Arab League chief lashed out at Iran for its "reckless policy" of attacking neighbours, including ones that host US forces. Gulf countries have been struck by hundreds of missiles and drones since the war started on February 28.
Saudi Arabia's defence ministry said on Monday it intercepted a drone attacking the country's massive Shaybah oil field. A day earlier, the country said a military projectile fell onto a residential area and killed two people of Indian and Bangladeshi nationality.
The US military said a service member died of injuries from an Iranian attack on troops in Saudi Arabia on March 1. Seven US soldiers have now been killed.
Two US officials said the State Department will order nonessential personnel and families of all staff to leave Saudi Arabia as Iran escalates its attacks. The officials spoke on condition of anonymity pending a formal announcement. Eight other US diplomatic missions have ordered all but key staff to leave: Bahrain, Iraq, Jordan, Kuwait, Lebanon, Qatar, the United Arab Emirates and the consulate in Karachi, Pakistan.
The war has killed at least 1,230 people in Iran, at least 397 in Lebanon and at least 11 in Israel, according to officials. Israel reported its first soldier deaths on Sunday, saying two were killed in southern Lebanon, where its military is fighting Hezbollah.
Desalination and oil facilities attacked
Bahrain accused Iran of indiscriminately attacking civilian targets and damaging one of its desalination plants, though its electricity and water authority said supplies remained online.
Desalination plants supply water to millions of residents in the region and thousands of stranded travellers, raising new fears of catastrophic risks in parched desert nations.
The strike came after Iran said a US airstrike damaged a desalination plant there. Foreign Minister Abbas Araghchi said the strike on Qeshm Island in the Strait of Hormuz had cut into the water supply to 30 villages.
He warned that in doing so, "the US set this precedent, not Iran".
In response, CENTCOM spokesperson US Navy Capt. Tim Hawkins said that "US forces do not target civilians -- period".
Iranian authorities also said Israel's overnight strikes on four oil-storage tankers and a petroleum-transfer terminal killed four people. Witnesses in Tehran said the smoke was so thick that it looked as if the sun had not risen.
Israel's military said the oil depots were used by Iran's military for fuel to launch missiles.
The Iranian Red Crescent Society warned Tehran residents to take precautions against toxic air pollution and the risk of acid rain. It also said about 10,000 civilian structures across the country had been damaged, including homes, schools and almost three dozen health facilities.