President Donald Trump on Tuesday warned Iran to immediately remove any naval mines in the Strait of Hormuz or face unprecedented military consequences, as Washington continues to weigh escorting commercial vessels through the vital shipping lane.
Trump issued the warning in a post on Truth Social, saying any attempt by Iran to mine the narrow maritime passage would trigger a severe response.
“If Iran has put out any mines in the Hormuz Strait, and we have no reports of them doing so, we want them removed, IMMEDIATELY! If for any reason mines were placed, and they are not removed forthwith, the Military consequences to Iran will be at a level never seen before,” he wrote.
“If, on the other hand, they remove what may have been placed, it will be a giant step in the right direction!”
He later said American forces have destroyed 10 inactive Iranian mine-laying boats and ships in recent hours, warning that additional strikes could follow.
CBS News earlier quoted US officials as saying that Iran may be preparing to deploy naval mines in the strategic waterway in an attempt to further disrupt shipping through the Persian Gulf. According to the officials, Tehran could use small boats capable of carrying two or three mines each to place them in the strait.
The warning comes as the United States continues to review options to protect maritime traffic in the region.
The chairman of the Joint Chiefs of Staff said Tuesday the Pentagon is examining possible measures, including escorting commercial vessels through the Strait of Hormuz, a route through which roughly a fifth of global oil supplies pass.
“We are looking at a range of options to set the military conditions to be able to do that,” Gen. Dan Caine said during a briefing when asked about escorting ships.
He said officials are evaluating the risks and resources required for such an operation.
The White House also signaled that the administration is preparing additional steps to ensure the strait remains open.
Press Secretary Karoline Leavitt said the Trump administration has already offered political risk insurance to tankers operating in the Persian Gulf and temporarily waived certain oil-related sanctions.
She added that Trump has also offered the US Navy to escort tankers if necessary, but confirmed that no ship has been escorted yet, days after the idea was first raised to reassure maritime trade companies.
“The President and his energy team are closely watching the markets, speaking with industry leaders, and the US military is drawing up additional options, following the President's directive to continue keeping the Strait of Hormuz open,” Leavitt said.
Iran's Guards threaten commercial ships
Iranian officials have meanwhile doubled down on their own warnings over access to the strait.
Alireza Tangsiri, commander of the naval forces of Iran’s Revolutionary Guard, said ships linked to what he called “aggressors” would not be allowed to pass through the Strait of Hormuz.
“If you have doubts, come closer and test it,” Tangsiri wrote on X.
Earlier, the Revolutionary Guards said Arab or European countries that expel Israeli and US ambassadors from their territories would be granted full freedom of transit through the strait starting Tuesday.
US officials say the military campaign against Iran has already reduced Tehran’s ability to carry out attacks.
Gen. Caine said ballistic missile launches have dropped sharply since the start of Operation Epic Fury.
“Ballistic missile attacks continue to trend downwards, 90% from where they started, and one-way attack drones have decreased 83% since the beginning of the operation,” he said.
Defense Secretary Pete Hegseth said the United States and Israel were “winning decisively” in the conflict and vowed the campaign would continue until its objectives are achieved.
The goals of Operation Epic Fury, he said, remain destroying Iran’s missile stockpiles, launchers and defense industrial base, degrading its naval capabilities and ensuring Tehran cannot obtain nuclear weapons.
“Our will is endless, but ultimately the president gets to determine the end state of those objectives,” Hegseth said.
Much of that privileged access is believed to operate through so-called “white SIM cards” – mobile lines exempt from Iran’s filtering system that allow direct access to blocked platforms such as X, Telegram and Instagram.
Spokeswoman Fatemeh Mohajerani did not directly refer to those SIM cards but spoke about the government-imposed national internet blackout, saying Tehran is instead offering connectivity to “those who can better deliver the message.”
According to internet monitoring group NetBlocks, the Iranian government has been promoting its agenda through whitelisted online services while the public remains in a digital blackout
“The regime continues to promote its agenda through whitelisted networks, cultivating media assets at home and abroad,” NetBlocks said on Friday, six days into the latest round of nationwide internet shutdown.
This is while President Masoud Pezeshkian vowed in early December to deactivate the so-called “white SIM cards” that grant unfiltered access to a circle of state-linked users.
“We have instructed that these white internet lines be turned black as well, to show what will happen to people if this blackness continues,” he said.
Pezeshkian has repeatedly promised to lift filtering, a key pledge of his 2024 presidential campaign.
Meanwhile, Iran’s nationwide internet shutdown has continued for more than 240 hours, marking one of the most severe government-imposed nationwide blackouts ever recorded globally and the second longest in the country’s history after the January protests, according to NetBlocks.
The group said on Tuesday that Iran has now spent roughly a third of the year 2026 offline.
On March 5, shortly after heavy strikes targeted areas near the Pasteur government complex in central Tehran – a district that houses the Iranian presidency and several key government offices – the Israeli military published a video depicting what it described as Khamenei’s underground bunker system.
The complex resembles a subterranean city. According to the video and accompanying imagery, the facility appears to have been used as a secure shelter for Iran’s leadership and may still be used by remaining officials following Khamenei’s death.
A tunnel network stretching nearly five kilometers
Analysis of the imagery released by the Israeli military, using publicly available online mapping tools, suggests the tunnel network extends close to five kilometers in length.
To understand the scale of the project, it helps to compare it with ordinary infrastructure construction in Tehran.
According to statements by Tehran mayor Alireza Zakani and members of the Tehran City Council, building one kilometer of metro tunnel in Tehran currently costs between 5,000 and 6,000 billion tomans – roughly $30-36 million at an exchange rate of about 166,000 tomans per dollar.
This estimate covers only the excavation and structural work. It does not include interior finishing, equipment, ventilation systems, or other underground facilities.
Based on those figures, building five kilometers of underground tunnel would cost about 25,000 to 30,000 billion tomans, or roughly $150-180 million.
Given the secrecy and security requirements surrounding such a project, the actual cost was likely significantly higher than that of a standard transportation tunnel.
Under normal conditions, tunneling contractors in Tehran can excavate around 10 meters per day. At that pace, building a five-kilometer tunnel system would take at least 500 days – roughly 17 months.
Considering the classified nature of the project and the additional infrastructure involved, the construction timeline may have been considerably longer.
The core of the complex: beneath a medical facility
The video appears to place the central section of the bunker complex southwest of the presidential compound in the Pasteur district.
The site sits directly beneath the Shahid Shourideh Medical Center, a clinic affiliated with Iran’s Ministry of Agriculture. The facility has operated since 1985 and effectively functions as part of the broader Pasteur government complex.
Based on the height of vehicle ramps and the dimensions of vehicles visible in the imagery, the central installation appears to be located 40 to 50 meters underground.
From there, the tunnel system extends northwest toward another entrance near the end of Rajabi Street, roughly 200 meters from the Shourideh hospital complex.
Easternmost entrance: next to an elementary school
The easternmost known entrance to the tunnel network appears to be located in the Sheikh Hadi neighborhood, along Valiasr Street, beneath the Jami multi-story parking garage.
This parking structure stands directly beside Hejrat Girls’ Elementary School, while Saheb a-Zaman Boys’ Elementary School lies about 100 meters away.
At the northern edge of the network sits another multi-story garage known as the 12 Farvardin Parking Complex, located near the intersection of Jomhouri Eslami Street and Danesh Street.
Both parking structures were inaugurated on December 4, 2017, as part of a paired urban development project attended by Tehran’s then-mayor Mohammad Najafi.
An entrance beneath a mosque, beside a school
Another entrance appears west of Pasteur Square, between Hor Metro Station and the square itself.
This access point lies beneath Tohid Mosque. Adjacent to the mosque is a building, and behind it stands Shahid Kadkhodaei Boys’ Elementary School.
Roughly 200 meters away, another possible entrance is located on the southwestern side of Pasteur Square, along a street that houses the AJA University of Command and Staff – the staff college of the Islamic Republic of Iran Army.
Nearby are the Karimeh Ahl-e Beit dental clinic and medical clinic, as well as the 29 Farvardin Pharmacy, which is affiliated with Iran’s army.
Western entrance beside a football school
The westernmost identified entrance to the tunnel network appears to lie beneath a small building near an office responsible for issuing hunting weapon permits.
Immediately next to the building, sharing a wall, is a football training school, while dense residential complexes surround the area.
This location sits near the intersection of Sepah and Kamali streets, along Kashan Street, at the end of Fourth Street.
The tunnels also lie close to the Yas and Namjou residential complexes, which are affiliated with the Iranian army.
Foreign Ministry spokesperson Esmaeil Baghaei said Iran did not start the war and that it had been in negotiations when the conflict began.
“We are in the eleventh day of military aggression by the United States and the Zionist regime. We did not start this war,” he said at a news conference.
“Military aggression is ongoing and therefore in this situation there is little place to talk about anything other than defense and a crushing response to the enemy,” he added, saying all of Iran’s focus is currently on defending the country.
Iran denies drone attacks on Azerbaijan, Turkey and Cyprus
Baghaei also denied on Monday that Iranian armed forces launched drones or missiles toward Azerbaijan, Turkey or Cyprus, as regional tensions spill beyond its borders.
He said Iran’s defense actions “should in no way be interpreted as hostility toward any of the countries in the region,” adding that the armed forces’ general staff had “explicitly and officially announced that such launches were not carried out from inside Iran or by our military forces.”
His remarks follow accusations by Azerbaijan that four drones crossed into its Nakhchivan exclave, striking the airport terminal and exploding near a school, injuring civilians.
President Ilham Aliyev called the incident an “act of terror,” demanded an explanation and apology from Tehran, and ordered the withdrawal of Azerbaijani diplomatic staff from Iran.
Earlier, Iran’s Foreign Minister Abbas Araghchi denied that Tehran launched drones toward Nakhchivan and told his Azerbaijani counterpart that Iran “denies any drone launch toward that republic,” according to state media.
He said Iran’s armed forces were investigating the reported explosions and accused Israel of seeking to disrupt relations between Muslim countries to harm Iran’s ties with its neighbors.
Turkey has said NATO air defenses intercepted an Iranian ballistic missile that entered Turkish airspace last week. Ankara protested to Tehran and has deployed F-16 fighter jets to Northern Cyprus as a precautionary security measure.
Cyprus has also reported a drone strike on a British base on the island, which it said was likely launched by Iran-backed Hezbollah rather than directly from Iran.
The threat was issued in a statement by the Office of the Prosecutor General, which said such cooperation, if deemed harmful to national security, could bring confiscation of all assets and other legal penalties.
The statement cited Article 1 of a law passed in October that increased penalties for espionage and cooperation with Israel and other countries deemed hostile to Iran’s national security and interests.
Under that law, operational or intelligence activities carried out on behalf of Israel, the United States or other “hostile” governments or groups can lead to the confiscation of all assets and the death penalty, the statement said.
The warning came after some members of the Iranian diaspora seeking change in Tehran gathered in cities across Europe and the United States to celebrate the killing of Supreme Leader Ali Khamenei in the US-Israeli war against Iran.
At the same time, newly created Telegram channels have published details about prominent Iranians abroad who criticized Iran’s clerical establishment and backed the US-Israeli airstrikes that began on February 28.
Between 5 million and 10 million Iranians are estimated to live abroad, mostly in the United States and Western Europe, according to Iranian official data and domestic media reports.
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