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DUBAI/WASHINGTON — The war over the Strait of Hormuz entered one of its most dangerous phases yet on Saturday, as Iran’s Islamic Revolutionary Guard Corps (IRGC) claimed its largest single strike of the conflict, saying it hit six vessels — three oil tankers transiting “unauthorized” routes through the strait and three additional US-linked vessels elsewhere — hours after the United States destroyed and disabled three Iranian tankers in response to an earlier Iranian missile attack on American warships.

The exchange marks a sharp escalation in a crisis that has now stretched past six months, drawn in multiple regional militaries, and repeatedly rattled global oil markets since fighting first erupted in late February.

Saturday’s Exchange

According to the US Central Command (CENTCOM), the day’s confrontation began when the IRGC fired ballistic missiles toward two US Navy assets — an aircraft carrier and a guided-missile destroyer — operating in the Strait of Hormuz. CENTCOM said both vessels “successfully evaded multiple unprovoked Iranian attacks” and that no American personnel were harmed, though officials acknowledged that targeting a carrier directly marked a notable provocation even by the standards of a war that has already run for more than half a year.

The United States retaliated within hours, striking three Iranian crude oil carriers identified by CENTCOM as part of a “shadow network” it says helps finance the IRGC and its regional partners. US forces permanently disabled two of the tankers — the M/T Downy off Kharg Island and the M/T Stark 1 near Jask — while a third vessel, the unladen M/T Kylo, was completely destroyed in the Gulf of Oman after its crew was ordered to abandon ship.

Iran’s response came soon after. In a statement carried by state broadcaster IRIB, the IRGC Navy said it had struck three oil tankers travelling through what it called unauthorized routes in the strait, along with three additional US-affiliated vessels “in other areas” — six vessels in total, which Iranian officials described as the single largest attack of the war to date. The force urged shipping in the Gulf not to be “deceived” by the US military’s account of events.

Precisely what the three “US-affiliated” vessels were remains unclear. Iranian statements have not specified whether they were US Navy warships, US-flagged commercial vessels, or ships otherwise linked to American interests, and as of this report, CENTCOM has not confirmed that any US Navy vessel was struck — its own account of the morning’s exchange describes both targeted warships as having evaded the Iranian missiles entirely. That gap between Tehran’s claim and Washington’s confirmed account is itself part of the story: in a conflict now defined as much by competing narratives as by battlefield reality, claims from both sides have regularly outpaced what the other confirms.

Six Months of Escalation

Saturday’s exchange did not happen in isolation. It is the latest flashpoint in what is now formally tracked as the 2026 Strait of Hormuz crisis, which began on February 28 when the United States and Israel launched a joint air campaign against Iran. In the six months since, Iran has responded by effectively closing the strait to a large share of commercial traffic — a waterway that, before the war, carried roughly a fifth of the world’s seaborne oil and a fifth of global liquefied natural gas.

The intervening months have seen a US naval blockade of Iranian ports, an Iranian counter-blockade and mine-laying campaign in the strait, and recurring waves of strikes and counterstrikes that have killed at least 20 seafarers and a port worker, according to tracking by the International Crisis Group, with dozens more injured. Independent maritime intelligence firms have documented dozens of individual vessel attacks since the war began, several of which sailed under third-country flags — Saudi, Qatari, Liberian, Cypriot — underscoring how the conflict has repeatedly drawn in shipping with no direct stake in the underlying US-Israel-Iran confrontation.

Diplomatically, the crisis has whipsawed between talk of imminent breakthroughs and renewed military escalation. As recently as early August, US officials — including Treasury Secretary Scott Bessent — signaled that a deal to reopen the strait to freer shipping traffic could be close, and President Trump himself repeatedly floated an agreement being “days away.” Those talks have consistently stalled over the question of who would control shipping through the strait going forward, with Iran and Oman reportedly working on a side arrangement that would give Tehran a greater management role — an outcome the White House has flatly rejected. Iran’s Foreign Ministry has meanwhile maintained that it will not fully reopen the strait until the US blockade of Iranian ports is lifted, a precondition Washington has so far declined to meet.

Market and Regional Fallout

The strait’s closure has repeatedly driven oil markets into volatility over the course of the war, though prices have generally stayed well below the highs of previous global energy shocks. Brent crude peaked near $126 a barrel in early May before easing on hopes of a negotiated reopening; by late August it was trading in the low-to-mid $90s amid renewed doubts that a deal was close. US Strategic Petroleum Reserve stocks, drawn down to blunt the impact of reduced Gulf supply, had fallen below 300 million barrels by mid-August — their lowest level since January 1983.

The economic pressure has not been confined to energy markets. Washington has in recent weeks widened financial sanctions targeting Iranian banks, shipping registries, and cash-transfer networks, moves that followed the United Arab Emirates’ own suspension of financial and economic dealings with Tehran after accusing Iran of firing ballistic missiles at Emirati territory.

What Comes Next

With CENTCOM and the IRGC now offering competing, only partially reconcilable accounts of Saturday’s exchange, the coming hours are likely to bring clearer detail on the identity and status of the “US-affiliated” vessels Iran says it struck, and on whether Washington plans a further retaliatory response. Given the pattern set over the preceding six months of the conflict, further tit-for-tat strikes — followed, eventually, by another round of diplomatic signaling about a possible deal — would fit the war’s established rhythm. Whether Saturday’s exchange proves to be a turning point toward broader escalation or simply the latest entry in a long list of claimed “largest attacks yet” is, for now, an open question.