Iran Claims Largest One-Day Tanker Toll of War as It Warns US on Hormuz

Iran's Islamic Revolutionary Guard Corps said Thursday that seven oil tankers were struck or disabled overnight in the Strait of Hormuz, calling it the largest single-day toll in the waterway since the United States and Israel went to war with Iran in February. The claim could not be independently verified, and US Central Command disputed part of it within hours, setting off another round of dueling narratives in a conflict that has repeatedly threatened to widen just as it appeared to be cooling.

The Guard's navy said in a statement that four tankers were struck by fire while transferring oil and that three others hit naval mines and were left disabled, with some vessels still burning as of Thursday morning. It warned Washington against continuing to escort tankers through parts of the strait it considers closed to vessels linked to the United States and Israel.

"The US military must know that if this trend continues, the conflict will extend to its bases in the region," the Guard said, calling it a serious warning.

A CENTCOM spokesperson, speaking on condition of anonymity, called the mine claims incorrect and said US forces have cleared the shipping lanes of mines, that Iran is relying on missiles and drones rather than mines, and that roughly 95 percent of vessels are still getting through the strait. The spokesperson described Iran's actions as a sign of "desperation" under the US naval blockade of Iranian ports. President Donald Trump went further on social media, accusing Tehran of fabricating the attacks to push up oil prices ahead of next month's US midterm elections and writing that Iran is "making up fake hits, mines, and everything else."

Numbers behind the claim

None of the figures in this dispute can be checked independently, but they illustrate the scale of what is being argued over. The oil benchmark Brent crude was trading at more than $111 a barrel Thursday morning, a level that keeps gasoline prices elevated in the United States two weeks before voters go to the polls. The Strait of Hormuz, a roughly 33-kilometer-wide channel between Iran and Oman, normally carries about one-fifth of the world's oil.

This is the latest flashpoint in a conflict that has already drawn repeated international attention to the strait. Iran claimed a similar strike on two tankers as recently as Oct. 15, and the OPEC cartel cited the ongoing war when it slashed its 2026 oil demand growth forecast earlier this month. The International Maritime Organization, the UN's shipping agency, said in its last public accounting, issued at the war's six-month mark in late August, that it had verified at least 70 attacks on commercial shipping in and around the strait since fighting began on Feb. 28, with 19 seafarers confirmed killed. At that point, the IMO said, as many as 400 vessels carrying roughly 6,000 seafarers remained unable to leave the Gulf safely. Those figures predate Thursday's reported strikes and almost certainly understate the current toll.

An eight-month war with no clear end

The conflict began Feb. 28, when the United States and Israel carried out joint strikes on Iranian territory. Iran responded by asserting control over Hormuz and barring what it called unauthorized passage of vessels tied to the two countries, and has periodically laid mines, fired on ships and seized tankers it accuses of violating its restrictions since then. Washington has countered with a naval blockade of Iranian ports, intercepted Iranian drones and missiles aimed at the strait, and struck Iranian vessels and coastal facilities it says support the war effort.

The UN Security Council adopted Resolution 2817 in March, condemning any Iranian action aimed at closing or obstructing navigation through the strait; it passed 13 votes to zero, with two abstentions. A follow-up text introduced by Bahrain and the United States in June sought to go further, explicitly demanding an end to attacks and to the laying of mines. Bahrain's ambassador, Jamal Fares Alrowaiei, told the Council that "recent developments have underscored the importance of keeping this strategic waterway safe, secure and fully open," while then-US Ambassador Mike Waltz called freedom of navigation "nothing less than a cornerstone of worldwide stability and commerce" and said those abusing the strait "are setting a very, very dangerous precedent." Iran's ambassador, Amir Saeid Iravani, rejected the draft as "deeply flawed, and one-sided," arguing that "the facts on the ground prove otherwise."

Who is affected, and how they are responding

The most immediate toll falls on civilian seafarers, thousands of whom the IMO says have been trapped aboard ships in the Gulf for months, facing dwindling supplies and fatigue as evacuation efforts have repeatedly stalled or been paused after vessels that had reached safety were later attacked elsewhere. Gulf shipping nations, including the United Arab Emirates and Kuwait, have had tankers linked to their state oil interests struck in earlier rounds of the conflict. Global energy consumers are affected more diffusely, through an oil price that has stayed elevated for months and that Trump himself has repeatedly blamed, in various directions, on Iranian actions.

Within the United States, the dispute has become entangled in midterm politics. Al Jazeera's White House correspondent reported Thursday that polling shows many Americans want relief from the costs of the war, and that rising fuel prices are creating pressure on Trump, including from within his own party, as the Nov. 3 elections approach.

Gulf states that rely on the strait for their oil exports have repeatedly pressed international bodies to act. When the IMO Council passed an earlier measure reaffirming transit rights through the strait, the United Arab Emirates' mission to the IMO said the international community had "spoke[n] in clear terms" in demanding Iran meet its obligations under international law, adding that using the strait "as a tool of economic coercion is unacceptable." Maritime security analysts tracked by trade publications such as gCaptain have noted that shipping insurers and operators have grown accustomed to routing decisions shifting week to week with the state of the conflict, even as the IMO continues to urge vessels to avoid the strait when crew safety cannot be assured.

Iran, for its part, has consistently argued at the Security Council and elsewhere that it is responding to US and Israeli aggression rather than initiating attacks, a framing Tehran repeated Thursday in casting its warning about US bases as retaliatory rather than offensive.

What's next

The immediate question is whether Washington treats the Guard's warning about striking US bases as a bluff or a genuine threat. CENTCOM's public position — that the strait remains open and that Iran's claims reflect weakness rather than strength — leaves little room for the administration to back down without appearing to concede ground. At the same time, Trump faces domestic pressure to avoid a further escalation that could push oil and gasoline prices higher just as voters prepare to cast midterm ballots less than two weeks away.

The war has already run through several cycles of this kind: periods of relative quiet around diplomatic overtures, followed by renewed strikes on shipping and a fresh round of competing claims about who is responsible. Nothing in Thursday's exchange suggests that pattern has broken. Diplomats at the UN have signaled no immediate plan for a new Security Council session specifically on the strait, though the IMO is expected to issue an updated casualty and shipping count as the conflict approaches its eighth month with no ceasefire in place and thousands of civilian seafarers still waiting to go home.