AI-assisted research analysis by FutureKnowledge. Sources checked 31 October 2026. This is not investment advice.
Reviewed by FutureKnowledge: figures, dates and attributions were checked against the linked sources before publication.
A Panama-flagged tanker, the Louise 1, with 27 Indian seafarers on board was hit by two limpet mines in the Strait of Hormuz, and front-month Brent settled at $117.64 a barrel on Friday, a six-month high. All crew were reported safe, but the attack introduces a cheap, hard-to-detect threat to the world’s most important oil chokepoint.
What happened in the Hormuz limpet mine attack
According to UK Maritime Trade Operations (UKMTO) Warning 187-26, as reported by gCaptain, an outbound tanker was attacked on Thursday, 29 October, about 25 nautical miles northeast of Khasab, Oman. A small boat attached two explosive devices above the waterline on the port side. The blasts started an engine-room fire and temporarily disabled the ship. Maritime security sources cited by Reuters via gCaptain identified the vessel as the Louise 1 and the devices as limpet mines. UKMTO said on Friday that the crew was safe, the fire was out, there was no environmental impact and the ship had resumed its voyage.
India’s Ports, Shipping and Waterways Minister Sarbananda Sonowal said on 30 October that all 27 Indian crew were safe, and that a second tanker, the Liberia-flagged VLCC Arzanah, with two Indian nationals aboard, had been targeted separately on 29 October, according to Maritime Gateway and The Logical Indian. The government’s statement described both incidents as “projectile attacks”, while security sources described the Louise 1 damage as limpet mines; reports differ on that point, and some Indian outlets date the Louise 1 attack to 30 October rather than 29 October. We follow the UKMTO timing.
Responsibility has not been established. Iran’s Revolutionary Guard navy said on Friday that three tankers caught fire after hitting mines on what it called an “unauthorised” southern route, a claim Reuters could not verify, gCaptain reported. WION noted that the IRGC’s earlier count of four tankers was not reconciled with its later figure of three. The Week reported that the ship is Dubai-owned and that the Financial Times reportedly attributed the attack to Tehran.
Why it matters: a new, low-cost threat
This is the first reported successful limpet mine strike on merchant shipping in the strait since the US-Iran war began in February; a September attempt failed to detonate. Martin Kelly of EOS Risk Group, quoted by gCaptain, said ships at anchor are especially exposed, because devices placed below the waterline could go undetected. The Greece-based risk group Marisks called the method “cheap, low tech and very efficient”, The Week reported.
Traffic was already thin. UKMTO’s weekly overview, cited by gCaptain, counted 122 outbound and 155 inbound transits in the latest seven days, still about 70% below pre-conflict levels. UKMTO has recorded 145 conflict-related incidents in its area since 28 February, 88 of them involving vessels in the strait.
Oil prices: Brent ends October at a six-month high
The December Brent contract expired on Friday at $117.64, up 2.4%, after touching $118, while the more active January contract rose $2.63 to $113.43, The National reported. WTI settled at $104.12. The roughly $4 gap between the two Brent contracts reflects the contract roll rather than a market fall, so quotes from Monday will refer to January.
Sources differ on the size of October’s rise. The National put Brent’s monthly gain at about 15% and WTI’s at about 12%; FinanceFeeds and Kotak Neo put them at 13.6% and 15.2%. All agree it was a fourth straight monthly gain. Beyond the tanker attacks, traders were weighing possible US strikes on Iran and renewed Qatari mediation in Tehran. We covered the earlier escalation in Brent’s move above $110 as tanker attacks spread and Trump’s comments on US strike options against Iran.
How it affects India and businesses
India’s exposure runs through two channels: its seafarers and its oil bill. This week alone, 29 Indian seafarers were aboard the two ships targeted. On the energy side, the US Energy Information Administration estimates that about 21 million barrels a day passed through Hormuz in 2022, and that China, India, Japan and South Korea together took 67% of its crude and condensate flows. Those are pre-war figures, but they show why Asian importers carry most of the risk.
Higher crude prices feed into India’s import bill, the rupee and inflation, as we set out in our analysis of India’s crude import bill. A threat that targets ships directly also tends to push up war-risk insurance and freight costs, which matters even for cargoes that are not bound for India.
Who is more or less exposed
- More exposed: oil importers and fuel-intensive sectors such as airlines, paints, chemicals and logistics, where crude is a big input cost; shipowners and crews using the southern route Iran calls unauthorised; and businesses that rely on Gulf-sourced LPG and LNG.
- Less exposed or better placed: upstream producers outside the Gulf and refiners with diverse crude sources, which can benefit from wider margins, as seen in Exxon’s and Chevron’s Q3 results. These are general patterns, not views on any company.
Scenarios to watch
The table below sets out conditional scenarios, not predictions.
| If… | Then, conditionally… |
|---|---|
| Limpet attacks recur, especially on ships at anchor | Insurers and charterers could demand more protection, keeping freight and risk premiums high even if crude supply is not cut |
| Qatari mediation produces a US-Iran framework | Some of the risk premium in Brent could unwind, easing pressure on importers such as India |
| US strikes on Iran resume after the 3 November midterms | Retaliation risk against shipping and Gulf infrastructure could rise, with further volatility in crude |
| OPEC+ keeps December targets unchanged on 1 November | Supply relief would have to come from diplomacy or shipping security rather than producers |
What to watch next
- The OPEC+ online meeting on Sunday, 1 November; three sources told Reuters the group is likely to hold December targets, FinanceFeeds reported.
- Any attribution of the Louise 1 attack, and further UKMTO warnings about mines or ships at anchor.
- Indian government advisories for seafarers and ship managers.
- Weekly Hormuz transit counts, which show whether shipowners are pulling back again.
Bottom line
The Louise 1 attack caused no casualties and the ship kept sailing, but it shows that a small boat with cheap explosives can disable a tanker in one of the world’s most closely watched waterways. With Brent ending October at a six-month high, the risk to shipping, rather than any confirmed loss of supply, is now a central driver of oil prices, and India sits close to both sides of that risk.
Method note: This analysis compared reporting from gCaptain (including Reuters material and UKMTO Warning 187-26), The National, FinanceFeeds, Kotak Neo, WION, The Week, Maritime Gateway and The Logical Indian, with pre-war flow data from the US Energy Information Administration as the primary source. Where reports differed on the attack date, the attack method and October’s percentage gain, we have said so and followed UKMTO for timing.