DUBAI, United Arab Emirates — Iran declared the Strait of Hormuz closed Tuesday and threatened to fire on any ship attempting to transit the narrow waterway, escalating fears of a global energy shock as the U.S.-Israeli war against Iran spread across the region. The escalation followed U.S. and Israeli strikes that began Feb. 28 and has since expanded to include Israeli strikes in Lebanon, a drone strike on a British air base in Cyprus and an attack that Saudi Arabia said caused limited damage at the U.S. Embassy in Riyadh, March 3, 2026.
Iran’s most explicit warning came in remarks carried by Iranian state media and reported by Reuters, which said an adviser to Iran’s Revolutionary Guard commander-in-chief described the strait as “closed” and warned ships would be targeted if they tried to pass.
Strait of Hormuz: what Iran’s “closure” means for shipping and energy
The Strait of Hormuz is the primary maritime outlet for Gulf oil producers and a critical route for liquefied natural gas shipments. Roughly one-fifth of global oil consumption moves through the corridor, which at its narrowest point is about 21 miles wide.
Even before Iran’s latest declaration, shipping and energy firms had begun pausing or rerouting traffic amid mounting attacks and electronic interference reports. Tanker and gas-carrier costs surged as vessels backed away from the area, and industry sources described traffic as approaching a standstill in a separate Reuters account on shipping disruptions and soaring freight rates. The report also noted U.S. Central Command, cited by Fox News, disputed claims the strait was fully closed, underscoring the gap between Iran’s declarations and what navies and commercial operators say they can safely do in practice.
War spreads to Lebanon, Cyprus and Saudi Arabia
As the maritime crisis deepened, fighting broadened beyond Iran. Hezbollah launched missiles and drones toward Israel, Reuters reported, and Israel responded with sweeping airstrikes on Hezbollah-controlled areas in Beirut’s southern suburbs. Lebanon’s state-run National News Agency reported at least 31 people were killed and 149 injured in the strikes, according to a Reuters dispatch on the conflict widening into Lebanon.
In Cyprus, U.K. officials said an attack drone hit the runway at the Royal Air Force base at Akrotiri late Sunday, causing minimal damage and no injuries. Cyprus President Nikos Christodoulides identified it as a “Shahed-type” Iranian drone, while officials said it was not immediately clear whether it was launched from Iran or by a Tehran-backed group, according to an Associated Press report on the strike at RAF Akrotiri.
In Saudi Arabia, the kingdom’s defense ministry said two drones hit the U.S. Embassy in Riyadh, causing a limited fire and some material damage. Reuters reported there were no immediate reports of injuries and that the embassy issued a shelter-in-place notice for U.S. citizens in Riyadh, Jeddah and Dhahran in the wake of the attack. Details were still being confirmed in Reuters reporting on the drone strike at the U.S. Embassy complex.
A long-running pressure point
Iran has threatened to use Hormuz as leverage in past crises, and earlier confrontations offer clues to why officials worldwide treat the latest statements as a potential inflection point rather than routine rhetoric.
During the 2011-12 sanctions standoff, Iranian military leaders issued warnings tied to U.S. naval movements in the Gulf, while Washington said it would continue transits regardless, as described in a 2012 Reuters report on Iranian threats amid tightening sanctions.
In 2019, amid renewed U.S.-Iran tensions, multiple commercial vessels were sabotaged near Fujairah — just outside the Strait of Hormuz — including two Saudi oil tankers, according to a Reuters account of the May 2019 vessel attacks. The incidents fed a broader debate over how quickly regional clashes can spill into global supply chains.
That same year, the U.S. sought to organize a multinational maritime effort to bolster surveillance and protect commercial passage through the chokepoint. A 2019 U.S. Naval Institute News analysis of Operation Sentinel described the push as an echo of earlier Gulf crises, highlighting the recurring challenge of protecting merchant traffic when tensions spike.
For now, diplomats and militaries across the region face a narrow window to prevent what shipping executives fear most: a prolonged period in which insurers, shipowners and energy firms conclude the Strait of Hormuz is simply too dangerous to use — regardless of whether any one side claims it is “closed” by decree.
