US Central Command announced on September 5 that its forces struck three Iranian crude oil tankers — permanently disabling the M/T Downy off Kharg Island and M/T Stark 1 near Jask, and destroying the unladen M/T Kylo in the Gulf of Oman after its crew was ordered to abandon ship [2][7][17]. CENTCOM said the strikes were retaliation for IRGC ballistic-missile fire at a US aircraft carrier and guided-missile destroyer patrolling regional waters, and that no US personnel were injured [1][6][14]. The targeted vessels were described as part of a multibillion-dollar shadow network financing the IRGC and its regional proxies [17][8]. The exchange came after weeks of relative calm in a six-month conflict that has killed 18 US service members [3][4][22].
Admiral Brad Cooper, commander of US Central Command, framed the operation as a cost-imposing deterrent: "Let the message to the IRGC be clear: If you shoot at two of our ships, we will impose an even higher economic cost — taking out three of yours" [5][7][22]. Cooper said US forces would not hesitate to defend American personnel and, if necessary, destroy Iran's "limited and exposed oil fleet" [8][12][16]. Defense Secretary Pete Hegseth issued a parallel warning on social media: "It's simple: if Iran shoots at US ships, we will destroy (and sink) their oil tankers" [3][23]. Treasury Secretary Scott Bessent described the broader campaign's objective as severing "every economic lifeline that sustains this tyrannical regime until Tehran stands alone" [33].
Iran's IRGC Navy announced that it had targeted three oil tankers traversing what it called unauthorized routes in the Strait of Hormuz and three US-linked vessels in other areas, describing the strikes as retaliation for the US tanker attacks [19][23][28][32]. The IRGC warned all vessels to avoid unapproved waterways or face targeting [24][32]. Iran's Khatam al-Anbiya military command stated that if the harassment of Iranian ships and the naval blockade continue, strikes against US military vessels would become more severe and could expand [5][6][26]. IRGC Naval Forces commander Ali Azimi said the strikes targeted three US-affiliated tankers passing through an unauthorized route in the strait [38].
Iran's Foreign Ministry condemned the US strikes on Iranian merchant shipping as violations of the UN Charter and "war crimes" under the law of naval conflict [26][34][35]. Foreign Minister Abbas Araghchi called Washington's declared economic war on Iran an admission of defeat and a distraction from internal US crisis [38]. Iranian state media characterized the attacking forces as a "terrorist army" [19].
The legal status of striking commercial tankers drew directly opposing assessments from international-law scholars. Wolff Heintschel von Heinegg, an emeritus professor of international law, argued that a US blockade of Iranian ports is lawful under the law of naval warfare if it is effective and impartial, and that firing on a tanker attempting to break such a blockade is therefore permissible [42]. Pierre Thielbörger, professor of international law at Ruhr University Bochum, held that while blockading specific enemy harbors may be lawful, blockading the entire Strait of Hormuz is not permitted, and that Iran's mine-laying has violated multiple rules of naval warfare [42]. Michael Schmitt, professor of international law at the University of Reading, argued that oil exported for commercial purposes does not qualify as contraband and that tankers carrying export oil do not become lawful targets merely for generating state revenue [43]. Rob McLaughlin, a naval-warfare expert co-authoring the analysis, explained that merchant vessels can be attacked only if they qualify as genuine military objectives [43].
President Donald Trump repeatedly minimized the conflict as "small potatoes" and "not a big thing" [3][18][22]. Vice-President JD Vance dismissed a question about whether a US strike killed people at a wedding gathering in southern Iran, saying "sometimes things happen," while confirming the US would investigate [12][3]. Vance also said dialogue would not be possible until Iran stops attacking commercial ships [10]. Wounded Iranian teenagers gave first-hand accounts of the wedding strike: thirteen-year-old Masoumeh Zarei said "the party had just started, and we wanted to go there. I had made my nails really pretty for the party, but everything changed" [34]. Fourteen-year-old Kiana Karimi described five explosions: "The first three explosions at the telecommunications tower threw us to the ground. I quickly got up to pick my brothers up off the ground. Then there were two more explosions, and after that I don't remember anything" [34].
Gulf Arab governments condemned attacks on merchant shipping as breaches of international law. Saudi Arabia's Foreign Ministry condemned Iran's targeting of the Saudi tanker Sidr and urged respect for international navigation safety [37]. Qatar's Foreign Ministry called the Sidr strike a flagrant breach of international law and a violation of UNSC Resolution 2817 [37]. Kuwait's Foreign Ministry called it an egregious violation and a direct threat to maritime navigation and energy supplies [37]. The Saudi shipping company Bahri confirmed two Filipino seafarers died aboard the struck tanker [37]. Market analysts warned that sustained damage to Kharg Island's terminal — which handles roughly 90 percent of Iranian crude exports — would remove 1.5 to 1.8 million barrels per day from world supply [33]. Brent crude closed at $96.28 a barrel, its highest since July 24 [5][24].
Regional-security analysts assessed that Iran's closure of the Strait of Hormuz is leaking and backfiring against its own economy, with Gulf producers finding alternative routes and exporting approximately 40 percent of pre-war volumes [41]. Samir Madani, founder of maritime tracking firm TankerTrackers.com, said Iran's closure of the strait "has more holes than the US naval blockade" and that Iran is failing to fully block the gaps [41]. Farzin Nadimi of the Washington Institute noted that Iran's degraded conventional capabilities have pushed it toward smaller rocket-launched mines as a way to keep threatening Hormuz shipping [35]. Danny Citrinowicz, an Iran expert at Israel's Institute for National Security Studies, assessed that Iran's missile attack on a US aircraft carrier shows Tehran is increasingly willing to accept risks it previously avoided, and that repeated limited US responses are weakening Washington's deterrence [34][36]. Vali Nasr of Johns Hopkins University argued that Iran's calculation is to escalate militarily so it can concede less in eventual talks [41]. Ellie Geranmayeh of the European Council on Foreign Relations suggested Tehran aims to let pressure build on Trump through the November midterm elections [41]. Iranian Parliament Speaker Mohammad Bagher Ghalibaf offered an internal caution: "We should not turn the Strait of Hormuz to its opposite. The Strait of Hormuz is valuable when traffic through it increases day by day, not when it decreases" [35].
UN Secretary-General António Guterres warned that the region is sliding toward an uncontrolled catastrophe and condemned attacks on civilian infrastructure, insisting diplomacy is the only way forward [44]. IMO chief Arsenio Dominguez stated that roughly 6,000 mariners remain trapped in the Persian Gulf — innocent civilian workers not trained for combat — and that no seafarer should risk their life simply for doing their job [44].
The reciprocal strikes mark a resumption of hostilities after weeks of relative calm, with both sides issuing threats of further action [4][25]. Trump has posted an AI-generated video depicting Kharg Island being "blown to smithereens" and has floated seizing the island, while Iranian authorities have pledged a strong response if the terminal is attacked [4][15][30].