Iran has launched a wave of missiles from at least four provinces, including anti-ship cruise missiles aimed toward the Strait of Hormuz, in what appears to be the retaliation the Islamic Revolutionary Guard Corps (IRGC) vowed after a reported US strike on Larak Island on Sunday.

Multiple reports describe ballistic missile launches from Tehran and Lorestan province, further launches from Karaj and Khorramabad, and additional ballistic missile fire from Shiraz in Fars province, alongside anti-ship cruise missiles fired from southern Iran toward the strait itself. The fact that the barrage spread across four provinces rather than originating from a single strike point signals that Tehran is deliberately widening the front rather than responding narrowly to the Larak Island attack — a pattern likely to be read by markets as an escalation rather than a contained tit-for-tat exchange.

The anti-ship cruise missile launches toward the Strait of Hormuz are the most directly relevant to oil markets, since they target the shipping lane itself rather than a fixed installation. The strait is one of the world's most important energy chokepoints: roughly a fifth of globally traded oil and about a fifth of liquefied natural gas passes through it, with no practical overland alternative at comparable scale. The launches revive the mine and projectile risk that US Central Command had only just described as cleared.

Background on the Larak strike

The barrage follows a US strike that hit two IRGC-N rocket launchers on Larak Island after they were observed being prepared to fire rockets fitted with sea mines into the Strait of Hormuz, a US official said. The IRGC confirmed the attack on Larak and said Iranian fighters and civilians had been killed or wounded, without providing a precise figure, and publicly vowed to respond.

That strike marked the first known US action inside Iran in several weeks — a lull that coincided with intensifying Oman-mediated diplomacy over reopening the strait to normal shipping traffic. Oman's role as mediator is consistent with its long-standing position as one of the few Gulf states maintaining close ties with both Tehran and Washington, which has made Muscat a recurring channel in prior hostage and de-escalation negotiations.

Threat to shipping lanes

The geographic spread of Monday's launches, reaching from the capital region down to Iran's southern coast, points to a coordinated response rather than a single localized strike. The inclusion of anti-ship cruise missiles aimed at Hormuz directly threatens the shipping lane the US had only recently said it had cleared of sea mines. The barrage comes just after US Central Command said it had cleared sea mines from Hormuz's main international shipping lanes.

US Central Command had also reported overseeing the safe passage of some 1,500 commercial vessels since reimposing its blockade, alongside continued incidents of tankers being struck by unidentified projectiles in the strait.

Market implications

Brent and WTI are likely to firm on the news, reversing some of the recent pullback tied to Oman-mediated talks over a temporary shipping corridor. Freight and war-risk insurance costs for tankers transiting Hormuz should also move higher — a meaningful cost variable for owners given that war-risk premiums in the region have historically spiked during prior rounds of tanker attacks and seizures in the Gulf.

The broader geographic spread of the launches, reaching toward Bahrain and other Gulf targets in past instances of this pattern, raises the risk of a wider regional response that could further disrupt shipping and energy infrastructure beyond Iran's own coastline.

Fragile diplomacy under strain

The exchange threatens to unwind the fragile, months-long effort to stabilise shipping through Hormuz, coming just as Oman and Iran had been floating a temporary transit corridor. With six months of conflict already behind them, both sides now face a fresh test of whether this round of strikes and counter-strikes stays contained to military targets or spreads further into the shipping lanes and infrastructure that global oil markets depend on. Watch next for any US or coalition response to the launches, the fate of the proposed Oman-mediated transit corridor, and whether commercial traffic through the strait is paused or rerouted in the days ahead.

Source: ForexLive / InvestingLive