Iran moved back toward a harder position on the Strait of Hormuz on Saturday, reversing the more limited reopening it had announced a day earlier and warning ships in the region not to approach the waterway while the United States maintains its naval blockade on Iranian vessels and ports. Iranian military statements carried by state-linked outlets said the strait would remain closed until the blockade is lifted, while Reuters and AP reported that merchant ships received radio messages from Iran’s navy saying they were not allowed to pass.
The renewed restrictions came less than 24 hours after Iran had said commercial transit could resume during a temporary ceasefire period. On Friday, Iranian Foreign Minister Abbas Araqchi said passage through the strait was open for commercial vessels, but Tehran also warned that the arrangement could be reversed if Washington did not end pressure on Iranian shipping. By Saturday, that warning had become policy.
Strait of Hormuz closure returns after brief reopening
Reuters reported that more than a dozen tankers had started moving through the strait after Friday’s reopening, including several older and non-Western-owned vessels that transited through Iranian waters under a managed arrangement. But by Saturday, shipping sources said other merchant vessels were receiving instructions from Iran’s navy that the passage was shut again and that no ships were allowed through.
AP reported that Iran’s Revolutionary Guard navy warned that no vessel should leave anchorage in the Persian Gulf or the Gulf of Oman and that any ship moving toward the strait would be treated as cooperating with “the enemy” and could be targeted. Reuters separately reported that Tehran had restored what Iranian officials called strict military control over the chokepoint, arguing that the United States had violated ceasefire conditions by keeping its blockade in place.
That shift matters well beyond the immediate military standoff. The Strait of Hormuz is one of the world’s most important shipping corridors, and roughly one-fifth of global oil normally passes through it. When traffic slows or stops there, the effect is felt quickly in energy markets, freight costs, insurance premiums and government planning across the Gulf and beyond.
Iran links shipping restrictions to U.S. blockade
Iran’s message on Saturday was clear: Tehran does not intend to allow any durable reopening of Hormuz while American pressure on Iranian maritime trade continues. Reuters reported that Iran’s armed forces command said the strait had returned to its previous status under strict management by the armed forces, and Iranian state media said Tehran was demanding payment for security, safety and environmental protection services tied to passage.
The U.S. position has moved in the opposite direction. On Friday, President Donald Trump said the Strait of Hormuz could be open for commercial traffic, but that the U.S. blockade on Iranian ports would remain fully in force until Tehran reached a broader agreement with Washington. Reuters reported that U.S. Central Command said American forces were continuing to enforce that maritime blockade, even as Iran tightened its own grip on the strait again.
That leaves both sides trying to impose different rules on the same body of water. Iran is signaling that freedom of movement cannot be separated from the treatment of Iranian shipping. Washington is signaling that commercial passage may resume only if pressure on Iran remains intact. Those positions are not compatible, and Saturday’s developments showed how quickly even a partial de-escalation can collapse when neither side changes its core terms.
Gunfire reports add to shipping fears
The standoff became more serious when vessels reported live fire. Reuters said two ships reported being hit by gunfire on Saturday, while AP cited the British military’s United Kingdom Maritime Trade Operations center as saying Revolutionary Guard gunboats opened fire on a tanker and that another projectile struck a container ship, damaging some containers. India’s foreign ministry also summoned Iran’s ambassador after shots were reported at two India-flagged merchant vessels.
Those incidents are likely to reinforce the caution already visible among shipowners and traders. Even when Iran briefly reopened the waterway, Reuters reported that some vessels approached and then turned back while operators sought clarity on whether the route was truly safe and under what conditions passage would be allowed. Saturday’s gunfire reports made that uncertainty much worse.
For Gulf producers, the issue is immediate. Reuters reported that Saudi Arabia, the United Arab Emirates, Iraq and Kuwait need regular tanker flows and unrestricted access through Hormuz to return to normal export operations. Liquefied natural gas cargoes from Qatar were also approaching the area on Saturday, but Reuters said no LNG cargo had transited the strait since the war began on Feb. 28.
Talks are still possible, but the pressure is rising
Despite the escalation, diplomacy has not entirely disappeared. AP reported that Iran said it had received new U.S. proposals and that Pakistani mediators were trying to arrange another round of direct talks. Reuters also reported that Tehran was reviewing fresh proposals but that no new date had been set for negotiations and that a broader framework of understanding would need to be agreed first.
That leaves room for more diplomacy, but not much room for error. A ceasefire tied to the wider regional conflict is due to expire on Wednesday, April 22, 2026, and both sides are using maritime pressure as leverage before any next meeting. Iran is showing that it can still disrupt one of the world’s most important energy routes. The United States is showing that it intends to keep tightening pressure on Iran’s economy unless it gets a wider deal.
Iran argues that the U.S. blockade itself is the provocation and that shipping cannot be normalized while Iranian vessels remain restricted. Washington argues that Tehran is using Hormuz as a tool of coercion and cannot be allowed to dictate access to an international chokepoint. Those competing positions explain why the brief reopening announced on Friday did not hold through Saturday.
For now, the practical result is straightforward. The brief hope of a broader reopening has faded, ship operators are again facing direct warnings from Iranian forces, and the Strait of Hormuz remains at the center of the confrontation between Tehran and Washington. Until either the blockade changes or the talks produce something more durable, the waterway is likely to remain unstable.
