"Two days ago, the Iranian regime had 11 ships in the Gulf of Oman, today they have ZERO," US CENTCOM said in a post on X.
"The Iranian regime has harassed and attacked international shipping in the Gulf of Oman for decades. Those days are over. Freedom of maritime navigation has underpinned American and global economic prosperity for more than 80 years. US forces will continue to defend it," it added.
With Iran at war and its supreme leader dead, Tehran faces a delicate question: whether to appoint a successor quickly to project continuity, or delay the decision to avoid presenting a new leadership target to its enemies.
Iran’s constitution allows for both. It requires the Assembly of Experts to choose a new supreme leader “at the earliest possible opportunity,” with no specific deadline.
In practice, the leadership may balance urgency against security risks. Naming a successor swiftly could reassure the political establishment and signal stability at a moment of national crisis. But during an active conflict, concentrating authority in a single new figure could also create a fresh focal point for external pressure.
Whatever timing Tehran ultimately chooses, the succession process itself is well defined.
In the Islamic Republic, the supreme leader is both the highest political and religious authority. His powers are sweeping. He serves as commander-in-chief of the armed forces, appoints the head of the judiciary and sets the state’s core strategies and red lines.
The constitution requires the leader to be chosen by the Assembly of Experts and to possess distinguished religious scholarship, deep knowledge of Islamic jurisprudence and politics, and strong managerial ability.
The interim leadership council
If the leader dies, resigns or becomes incapacitated, the constitution mandates that a successor be selected without delay. Until that happens, a temporary three-member council assumes his powers.
The interim council was formed immediately after Khamenei’s death: President Masoud Pezeshkian, Judiciary Chief Gholam-Hossein Mohseni-Ejei and senior conservative cleric Alireza Arafi, a member of the Guardian Council and head of Iran’s seminaries.
The council oversees the armed forces, manages national security and supervises key institutions. Its authority, however, is strictly temporary and ends once a new leader is appointed.
How the leader is selected
The Assembly of Experts is composed of 88 clerics elected every eight years in nationwide polls. All candidates must first be vetted by the Guardian Council for religious and political qualifications.
Formally, the Assembly not only selects the leader but also monitors his performance and has the authority to dismiss him if he is deemed unfit. In practice, it has consistently endorsed Khamenei’s leadership without public dissent.
To choose a successor, the Assembly convenes in closed session. Members review potential candidates, assess their qualifications and vote. A majority is sufficient. If no candidate fully meets the constitutional criteria, members may select a figure based on overall leadership capacity.
Deliberations are confidential, and the result is announced only after a decision is finalized.
Power behind the scenes
While the constitution assigns the process to the Assembly, informal power centers may prove decisive.
Senior commanders of the Islamic Revolutionary Guard Corps (IRGC) are widely believed to play a decisive role in shaping elite consensus. Intelligence and judicial institutions can also shape outcomes through internal assessments of potential candidates.
Senior clerics in Qom, particularly grand ayatollahs with independent religious authority, may indirectly influence opinion within the Assembly. Although they hold no formal role in the vote, their views can carry weight in determining religious legitimacy.
Given the current climate of unrest and regional conflict, the interplay among these actors could prove pivotal. For many within the system, the overriding priority is likely to be continuity and institutional survival.
Potential successors
Khamenei’s will has not been made public, and he did not officially designate a successor. Nonetheless, several names have circulated for years.
Mojtaba Khamenei, 55, the late leader’s second son, is a mid-ranking cleric believed to wield influence behind the scenes. Though he has never held senior elected office, he is thought to have close ties to parts of the security establishment.
Alireza Arafi, 65, a member of the interim council, is considered a conservative with strong institutional ties. His leadership of the seminaries and role in the Guardian Council position him as a potential consensus candidate within the establishment.
Hassan Khomeini, 53, grandson of the Islamic Republic’s founder Ruhollah Khomeini, teaches in Qom and oversees his grandfather’s shrine. He is associated with reformist and centrist political circles and was disqualified from running for the Assembly of Experts in 2016. His religious credentials and symbolic lineage could strengthen his standing, particularly if broader legitimacy is seen as valuable.
Mohammad-Mehdi Mirbagheri, 63, a hardline cleric and member of the Assembly of Experts, is known for his staunch ideological positions and close alignment with conservative currents.
Mohsen Araki, 69, a former Guardian Council member with experience in international religious outreach, has also been mentioned as a possible contender.
Ultimately, the succession will hinge less on public debate than on negotiations within the clerical and security elite.
Tehran will want to project normal constitutional continuity, but in the middle of a war it is entirely possible that internal power dynamics and external pressures—not just the formal procedures—will shape both the leadership outcome and Iran’s future.
An Iranian drone strike on a hotel in Bahrain injured two US Defense Department employees, The Washington Post reported, citing a State Department cable it reviewed.
“Two U.S. DOD personnel were injured,” the cable said, referring to the Department of Defense, according to the report.
The cable, sent on Sunday, did not provide further details, the newspaper said.
White House press secretary Karoline Leavitt said on Monday 49 Iranian leaders, including Supreme Leader Ali Khamenei, were wiped off in the opening US strikes on the country.
“Killing terrorists is good for America. Forty-nine of the most senior Iranian regime leaders – including Supreme Leader Ayatollah Ali Khamenei – have already been wiped off the face of the Earth so far in the opening strikes of Operation Epic Fury,” Leavitt said.
"For 47 years, the Iranian regime has actively and intentionally facilitated the killing of Americans while chanting 'death to America' and funding other bloodthirsty terrorists," she added.
"Last night, US B-1 bombers, struck deep inside Iran to degrade Iranian ballistic missile capabilities," CENTCOM said in a post on X.
"As the President stated, 'we're going to destroy their missiles and raze their missile industry to the ground.'"
President Donald Trump strongly dismissed criticism that he might “get bored” with the ongoing military campaign against Iran, asserting that the United States has both the capability and resolve to continue operations far longer than initially projected.
“From the beginning, we projected four to five weeks, but we have capability to go far longer than that, we'll do it," Trump said on Monday. "Whatever somebody said today, they said, Oh, well, President wants to do it really quickly. After that, he'll get bored. I don't get bored.”
Trump said while the campaign was initially expected to last four to five weeks, Washington is prepared to sustain operations as long as necessary.
His remarks come after he told the New York Post he would not rule out deploying American ground troops “if they were necessary,” while describing the military operation — dubbed Operation Epic Fury — as already “way ahead of schedule.”
The operation, launched Saturday in a joint US-Israel strike on Tehran, killed Supreme Leader Ali Khamenei and targeted key military and leadership infrastructure.
Speaking Monday, Trump framed the campaign as a decisive effort to neutralize what he called an existential threat posed by Tehran.
“This was our last best chance to strike what we're doing right now and eliminate the intolerable threats posed by this sick and sinister regime and they are indeed sick and sinister,” he said.
Trump outlined four primary objectives: destroying Iran’s missile capabilities, dismantling its naval forces, preventing Tehran from obtaining a nuclear weapon, and stopping the regime from arming and directing proxy groups abroad.
“First, we're destroying Iran's missile capabilities, and you see that happening on an hourly basis,” he said. “Second, we're annihilating their navy. We've knocked out already 10 ships. They're at the bottom of the sea.”
He added, “We're ensuring that the world's number one sponsor of terror can never obtain a nuclear weapon. Never going to have a nuclear weapon.”
In remarks to CNN earlier, Trump said the US military is “knocking the crap” out of Iran but warned a larger phase of operations may still be ahead, urging civilians inside Iran to remain indoors because conditions were unsafe.
US service members killed
The White House address also struck a somber tone as Trump confirmed four US service members were killed following Iranian attacks in the region.
“Today, we grieve for the four heroic American service members who have been killed in action, and send our love and support to their families,” he said.
“In their memory, we continue this mission with ferocious, unyielding resolve to crush the threat this terrorist regime poses to the American people.”
US Central Command confirmed the fatalities Monday, underscoring the growing regional escalation as Iran launched new waves of attacks on US bases, according to Iranian state media.
Regional tensions intensified further after the United Arab Emirates said its air defenses intercepted nine Iranian ballistic missiles, six cruise missiles and dozens of drones, while Qatar announced it had shot down two Iranian Su-24 bombers.
Energy markets were also shaken as drone strikes forced shutdowns at a major Saudi refinery and oil and gas facilities in Israel and Iraq’s Kurdish region, pushing global oil prices sharply higher.
Meanwhile, US Secretary of Defense Pete Hegseth described the campaign as “limited and decisive,” saying the objective is to destroy Iran’s missile and nuclear threats rather than launch an open-ended war.
The International Atomic Energy Agency said Monday it had no indication Iran’s nuclear facilities suffered major damage, though Tehran’s envoy claimed the Natanz enrichment site was struck.
Iranian state media also reported that Mansoureh Khojasteh Bagherzadeh, the wife of Ali Khamenei, died following the US-Israeli airstrikes.
Trump insisted the United States holds overwhelming military advantage.
“We have the strongest and most powerful by far military in the world, and we will easily prevail,” he said. “We're already substantially ahead of our time projections. But whatever the time is, it's okay. Whatever it takes, we will.”