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Iran Conflict 2026
16JUN

Hellfire disables a cargo ship's engine

3 min read
10:20UTC

CENTCOM fired a Hellfire missile into the engine room of the Gambian-flagged M/V Lian Star in the Gulf of Oman around 30 May, the blockade's first disabling of a commercial hull by munition.

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Key takeaway

The blockade crossed a threshold: from redirecting ships to destroying a civilian hull's ability to move.

CENTCOM (US Central Command) disabled the Gambian-flagged bulk carrier M/V Lian Star in the Gulf of Oman around Saturday 30 May, firing a Hellfire missile into its engine room after the crew ignored more than 20 blockade warnings 1. The Hellfire is a US precision air-to-ground missile. CENTCOM is the US combatant command that has run the Hormuz blockade since mid-April.

CENTCOM disabled the ship rather than seizing it, leaving its civilian crew aboard a powerless hull, and its cumulative redirection count reached 116 vessels. Every prior interdiction had turned ships away or boarded them.

This is the first time the 90-day blockade has crossed into disabling a commercial hull by munition. The rules of engagement have hardened beyond the Bandar Abbas strikes on Iranian naval targets , which hit military boats and a missile site rather than a merchant ship.

The shift changes the risk calculus for civilian shipping near the blockade zone. A disabled hull adrift with crew aboard also widens Washington's legal exposure under maritime law, where a powerless ship in a busy strait is itself a hazard to other traffic.

Deep Analysis

In plain English

US forces fired a Hellfire missile (a precision weapon normally used to destroy tanks or targeted vehicles) into the engine room of a cargo ship, leaving it unable to move. In 90 days of blockade operations, CENTCOM had previously boarded or redirected 115 vessels. This is the first time it destroyed a commercial vessel's propulsion using a missile. Lian Star's crew, stranded on a powerless hull, cannot leave under their own power. The ship is registered in Gambia, not Iran, meaning the US struck a third-country commercial vessel. Under international maritime law, firing on a non-combatant commercial vessel requires proportionality and exhaustion of lesser means; CENTCOM issued more than 20 warnings before firing.

Deep Analysis
Root Causes

The Lian Star disabling reflects a rules-of-engagement progression that began at redirection (week 1), moved to boarding (week 2), then to Iranian-hull disabling (week 3), and has now reached third-flag hull disabling (week 11). Each step was preceded by a specific compliance failure. The Lian Star's crew ignored more than 20 warnings, which CENTCOM treated as sufficient justification for escalation to munition.

The underlying structural driver is that the blockade's earlier deterrent credibility eroded: 116 cumulative redirections still produced vessels attempting to run the zone. CENTCOM needed a cost-imposing action that fell short of sinking to restore deterrence without triggering a humanitarian crisis.

What could happen next?
  • Precedent

    Third-flag commercial vessels are now subject to propulsion-kill rules of engagement if they attempt to run the blockade zone after 20 warnings, a doctrinal expansion CENTCOM has not formally published.

    Immediate · Assessed
  • Risk

    Gambia as flag state faces liability questions for its vessels in the blockade zone; smaller flag-state registries may accelerate flag-switching away from the Gulf.

    Short term · Assessed
  • Consequence

    Lloyd's of London's war-risk underwriting committee will need to price a new risk category: propulsion-destruction of insured hulls by US munition, not just mine or missile damage from hostile actors.

    Short term · Assessed
Sources:CBS News·ABC News
Mentions:M/V Lian Star →CENTCOM (US Central Command) →Oman →Strait of Hormuz →Tanker War →Operation Praying Mantis →Iran →IISS →RAND Corporation →US Navy →Washington →Bandar Abbas →Strait of Hormuz Toll System →Hellfire →Gulf of Oman →
First Reported In

Update #113 · Trump signs nothing as a Hellfire hits a hull

CBS News· 31 May 2026
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Causes and effects
This Event
Hellfire disables a cargo ship's engine
Crossing from redirection to munition-disabling of a civilian ship hardens the blockade's rules of engagement beyond any prior interdiction, including the Bandar Abbas naval strikes.
Led to
CENTCOM hits Goruk and Qeshm Island
The Goruk/Qeshm strikes extend the kinetic lineage from the Hellfire strike on the Lian Star.
Occurred 31 May 2026
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Trump: blockade stays till deal signed
The Lian Star Hellfire disabling escalates the prior blockade-stays-till-signed posture from redirection to propulsion destruction by munition.
Occurred 24 May 2026
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US strikes Iran's naval base mid-talks
The Lian Star strike escalates beyond the prior CENTCOM Bandar Abbas strikes on Iranian naval targets to the first disabling of a commercial civilian hull by munition.
Occurred 25 May 2026
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Blockade hits 121 ships, one holed
CENTCOM's 116-vessel redirect total on 30 May was the baseline from which the 121-vessel figure on 1 June represents a continuation and widening.
Occurred 1 Jun 2026
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Different Perspectives
G7 Leaders (ex-US)
G7 Leaders (ex-US)
Kananaskis ended without a joint communique for the first time in the body's history; Macron credited G7 pressure with speeding the ceasefire while Trump publicly denied the summit played any role. The split between US and European G7 partners over what the memorandum means for sanctions relief was the direct cause of the text failure.
Protection-and-Indemnity insurers
Protection-and-Indemnity insurers
London-based P&I mutual clubs declined to underwrite Hormuz crossings while the IRGC Strait Authority remained operational, making the passage commercially impassable regardless of the memorandum's terms. Shipping operators said they would wait weeks for on-water conditions to change before routing tankers through.
IRGC Persian Gulf Strait Authority
IRGC Persian Gulf Strait Authority
P&I mutual insurers declined to underwrite Hormuz crossings on 15-16 June while the IRGC's Strait Authority remained in operation, reducing actual transits to two vessels against a pre-war daily rate of 94. The corps' revenue-generating toll mechanism, created 5 May and collecting $1.5-2 million per VLCC in crypto, has not been stood down and cannot be dissolved by Ghalibaf's signature.
Israeli Cabinet
Israeli Cabinet
Netanyahu admitted he had not seen the memorandum's text but confirmed IDF forces would stay in southern Lebanon; Finance Minister Smotrich called for ten Beirut buildings destroyed per Hezbollah drone and National Security Minister Ben-Gvir said the agreement 'does not bind us in any way'. Israel signed nothing in Islamabad and is the central unresolved variable in the Lebanon clause.
Iranian Majlis hardliners
Iranian Majlis hardliners
Around 60 MPs signed a letter demanding Ghalibaf explain the memorandum; Paydari faction MP Sabeti said the deal violates the Supreme Leader's red lines, and MP Aboutorabi argued the document carries binding obligations 'that cannot be resolved by simply changing the name'. President Pezeshkian defended the negotiators against accusations of betrayal, confirming the fracture inside Iran's political class.
US Vice President JD Vance
US Vice President JD Vance
Vance signed on 15 June and said the memorandum was 'not conditioned on Israel withdrawing from Lebanon' while also saying it 'envisioned a ceasefire that covers both Iran and Lebanon'. The two formulations are incompatible and hand Iran's foreign minister a ready-made violation claim before Geneva.