Two oil tankers carrying a combined 2 million barrels of crude have caught fire after striking naval mines in the Strait of Hormuz, according to Iran's Revolutionary Guards Navy — a claim that no independent source has confirmed and that shippers should treat with caution given the information war now surrounding the waterway.

The official Iranian news agency IRNA reported the incidents on Saturday, October 17. It said both vessels had switched off their positioning and radar systems and attempted to transit the strait via a route Iran has not authorized. One tanker was left immobilized after the mine strike, IRNA added. State media had earlier reported a second mine strike on another tanker making the same kind of unauthorized crossing.

The claims are unverifiable. No third party — no flag state, no operator, no commercial tracking service — has corroborated the Guards' account. In a conflict where both sides shape the narrative, an assertion from a belligerent's navy about mine hits is a data point, not a fact.

What does this mean for shipping through Hormuz?

The Strait of Hormuz remains the world's most important oil chokepoint, and the pattern of incidents is deteriorating fast. Maritime officials said on Wednesday that a container ship and a dry bulk carrier sank near the strait in separate incidents after being hit by projectiles. Container and dry bulk operators — not just tanker owners — are now in the firing line.

Attacks around the waterway have surged over the past two weeks. Iran says it is escalating strikes in response to the US blockade of its ports and tougher sanctions imposed last month. The consequence for the market has already registered: disruptions to shipping in the strait, driven by the US-Israeli war on Iran, have pushed up global energy prices and fed inflation well beyond the freight sector.

For charterers and refiners, a mine threat is categorically different from projectile attacks. Mines deny sea space rather than targeting specific hulls. If the Guards' claim that tankers are using "unauthorized routes" is accurate, it implies Iran is enforcing its own transit regime — with lethal hardware — on a waterway that operates under freedom of navigation. If the claim is false, it still signals Tehran wants the market to believe mines are in the water, which achieves a similar deterrent effect on owners and their insurers at near-zero cost.

Either way, war risk premiums on Hormuz transits face upward pressure, and crews switching off AIS to avoid detection are compounding the danger for everyone else on the water.

How bad is the reporting gap?

There is a second problem: the visible incident count is unreliable. As UKMTO — the UK Maritime Trade Operations body — has indicated, most ship attacks in the region go unreported. That means the two mined tankers, the two sunken vessels, and the two-week surge in strikes represent only what has surfaced publicly. The true operational picture is almost certainly worse.

The fog cuts both ways. Iran benefits from amplifying successful interdictions; operators benefit from silence to protect schedules, crews and insurance positions. Shippers planning Gulf loadings should assume the risk baseline is higher than any published incident tally suggests.

For forwarders and BCOs with cargo booked through Gulf gateways — container flows through Jebel Ali and feeder transshipments through the strait — the sinking of a containership this week is the clearest signal yet that project cargo and box equipment, not just crude, sit in the risk zone. Delays, reroutings and additional war-risk surcharges are the practical commercial consequences to price in now.

Iran has given no indication it will scale back. With attacks accelerating over the past two weeks and Tehran explicitly tying its strikes to the US port blockade and last month's sanctions, the trajectory for Hormuz transits points toward further disruption before any de-escalation.