Iran's Revolutionary Guards announced that ballistic missiles launched by their Aerospace Force struck and damaged a US aircraft carrier and navy destroyer, forcing both warships to withdraw from the engagement area [4][34]. US Central Command said the two warships — an aircraft carrier and a guided-missile destroyer — evaded all Iranian missile fire without US casualties, and that American forces subsequently struck three Iranian oil tankers [2][5][7]. Iran separately claimed to have attacked an unmanned US naval vessel near the strait, which CENTCOM dismissed as a "total lie" [4][8][21]. The exchange is the latest round in a six-month conflict that resumed after a ceasefire lapsed [5][21].
The IRGC stated that the targeted warships had been harassing Iranian vessels and participating in a naval blockade of Iran [4][15]. CENTCOM identified the three targeted vessels as the crude carriers M/T Downy, M/T Stark 1, and the unladen M/T Kylo — two permanently disabled and one completely destroyed — describing them as part of a multi-billion-dollar shadow network financing the IRGC and its regional proxies [5][7]. Admiral Brad Cooper, commander of US Central Command, warned that "if you shoot at two of our ships, we will impose an even higher economic cost — taking out three of yours" [2][6][13][29]. Defence analyst Wolfgang Pusztai described the targeting of an aircraft carrier — what he called "the backbone of the American campaign against Iran" — as a very significant development and a "calculated escalation," as also reported by Iran's Shargh Daily [2][34]. Sina Azodi, director of the Middle East Studies Programme at George Washington University, said neither side can afford to back down and that only a political settlement can end the war [2].
President Donald Trump called the conflict "small potatoes" and declared the Strait of Hormuz open and under total US control [5][8]. Energy Secretary Chris Wright said average flows through the strait exceed 9 million barrels per day and that regional traffic has returned to roughly two-thirds or more of pre-conflict levels, adding that Iran is "clinging on to power" as its navy, air force, and nuclear programme are destroyed [3][8][21][28]. Iranian Parliament Speaker Mohammad Bagher Ghalibaf declared that "the era of proportionate responses is over" and warned that any new US aggression would meet a "faster, more intense and more painful response" [8][19][21]. Mohsen Rezaei, secretary of Iran's Supreme National Security Council, announced that Tehran will declare a prohibited maritime zone outside the strait, starting at the US naval blockade line, and that any ship entering it will be placed on a sanctions list; Al-Sumaria, citing RT, additionally reported Rezaei as declaring the strait "completely closed" [20][23][27]. Iran also stated it would announce a new shipping route agreed with Oman in the coming days [19].
Shipping data from Kpler show transits falling to an average of ten cargo ships per day over the past ten days, with only two ships on Saturday and six on Sunday, and no supertanker departures since the preceding Wednesday [23][27]. Al Jazeera cited Kpler data showing only five to thirteen daily transits through the strait [2]. Middle East Eye reported that Middle East crude oil exports in August were down 39 percent from the January-February baseline of 18.5 million barrels per day [15]. Russian analysts in Rossiyskaya Gazeta disputed US government traffic figures as self-serving and estimated the genuine market deficit at up to two million barrels per day [38]. Brent crude closed at $96.28 a barrel and US diesel prices reached a record $5.85 per gallon [2][5][21].
Iran's Foreign Ministry condemned the US tanker strikes as "illegal and aggressive actions" [8][17]. Foreign ministries across Saudi Arabia, Qatar, Kuwait, Egypt, Jordan, Bahrain, the UAE, and Yemen condemned Iranian missile and drone attacks — including a strike on the Saudi tanker Sidr that killed two Filipino crewmen — as flagrant violations of international law, the UN Charter, and Security Council Resolution 2817 [35][36]. The IRGC Navy warned vessels in the Gulf not to transit "unauthorised waterways" and said ships using such routes would be targeted [1][6]. Iran's Foreign Ministry spokesman Ismail Baghaei accused Washington of making the world pay for a war that the US and Israel started, saying the strait was fully open until the 28 February attack on Iran [25]. CENTCOM reported that US forces have redirected 92 commercial vessels, disabled three, and boarded two during the maritime blockade [26].
War-risk insurance premiums for Hormuz transits rose from 0.15–0.25% of vessel value before the conflict to as much as 3–10%, adding $7–8 to the cost of a barrel of crude, with claims nearing $2 billion [30][31]. Ankit Goyal, a chief officer stranded for a month aboard a cargo vessel near the strait, described witnessing daily missile and drone attacks: "It was like a horror show and it was happening every day" [44]. Maritime industry advocate Dharmesh Shah stated that merchant seafarers "are civilians, they are not combatants and should never become casualties of geopolitical conflicts" [44]. The Japan Shipowners Association said it was seeking any means to resume transits through the strait [39]. Reports of a US missile strike on a wedding at Sirik and the Minab school attack that killed at least 156 people — under Pentagon investigation as a possible targeting error — prompted Iranian declarations of war crimes and Pakistani calls for a negotiated settlement [5][10][12][22]. Vice President JD Vance said he was "extremely sceptical" of Iranian accounts that US strikes killed civilians at a wedding but confirmed the United States would investigate [5][12].
Asian importers pointed to diversified sourcing and strategic reserves as buffers against the disruption. India's Ministry of Petroleum and Natural Gas stated that about 70% of crude imports were coming via routes outside the Strait of Hormuz [41]. Analysts assessed China's strategic and commercial reserves as sufficient for up to six months of Middle East supply disruption [42]. South Korea's National Assembly Research Service recommended a supply-chain resilience strategy, noting high dependence on Middle East crude [37]. Energy and security experts cautioned that existing and planned pipelines can divert only a small share of the chokepoint's flows and create new transit dependencies [43]. Treasury Secretary Scott Bessent stated that new pipelines could make the strait "a worthless piece of water" within two years, a timetable that analysts including Neil Atkinson of the National Center for Energy Analytics called "far-fetched" [2][30].
The Iranian government announced a doubling of top-tier gasoline prices from 8 September [16][23]. Analyst Ali Akbar Dareini of the Center for Strategic Studies in Tehran said Iran is preparing to push oil prices above $100 per barrel [2]. The Khatam al-Anbiya central command warned that if the US naval blockade and harassment of Iranian ships continue, Iranian strikes against US military vessels will become more severe and may expand [7][16].