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Tanker attacks in Strait of Hormuz surge to wartime high as Iran escalates maritime campaign

Eleven vessels hit in one week, exports drop 40% as shippers face daily threats and rising casualties

By LineZotpaper
Published
Read Time2 min
Oil tankers transiting the Strait of Hormuz are being attacked almost daily, with 11 vessels struck in the week ending October 4 — the highest weekly tally since the war began — as Iran escalates efforts to disrupt crude exports. Another five tankers have come under fire this week, and at least nine sailors have died since July, according to UN and industry data.

A surge in attacks on commercial shipping in the Strait of Hormuz has pushed the region to its most dangerous point since hostilities broke out in late February, with the International Maritime Organization (IMO) recording 11 tankers struck during the week ending October 4. Maritime security firm Marisks reported that a projectile struck the UAE-owned tanker On Peace on Monday, injuring 12 Indian national sailors.

The Joint Maritime Information Center (JMIC), a coalition of US-led allied militaries headquartered in Bahrain, warned commercial ships on Thursday that Iran continues to assert its presence along key transit lanes and maintain pressure on vessels. A senior Iranian Revolutionary Guard official was quoted by the Fars News Agency on Wednesday saying Iran will block all “illicit routes” through Hormuz.

Crude exports through the strait have fallen sharply. Data from Kpler, published Friday, shows volumes stood at 8.5 million barrels per day (bpd) for the week ending Wednesday — about 40% below prewar levels. Middle East-wide shipments reached 15.3 million bpd, 10% below normal. Iran itself has not loaded any crude for export since late August due to the US naval blockade, according to Kpler.

Despite the attacks, US Central Command reported on Wednesday that 20 million barrels of crude had transited the strait, rejecting Iranian claims that the waterway is closed. US military escorts along a route near Oman’s coast have helped exports rebound to prewar levels in September, but “volumes are getting through at a time of extremely high maritime risk,” said Michelle Wiese Bockmann, senior maritime intelligence analyst at Windward.

Shipping industry leaders warn the situation is unsustainable. “This is not a sustainable new normal,” said Richard Meade, editor in chief of Lloyd’s List, during a Thursday briefing.

The Revolutionary Guard has signaled it will extend its campaign deeper into the Persian Gulf, vowing to pursue ships throughout the region that violate Iran’s transit rules, according to state media outlet Tasnim. At least nine sailors have died in ship attacks since July, the IMO reported.

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Analysis

Why This Matters

  • The surge in attacks threatens global oil supply chains: the Strait of Hormuz handles roughly a fifth of the world’s seaborne crude, and sustained disruption could push energy prices higher worldwide.
  • Rising sailor casualties and daily strikes signal a dangerous escalation that could draw deeper US or allied military involvement.
  • If Iran succeeds in choking exports, it may trigger a diplomatic crisis and force major importers to reassess energy security.

Background

The Strait of Hormuz, a narrow waterway between Iran and Oman, has long been a strategic chokepoint for oil shipments from the Middle East. Tensions have intensified since late February, when a broader conflict involving Iran and its proxies erupted. The US has maintained a naval presence in the region and established escort routes to protect commercial traffic, but attacks have continued to mount. Iran’s Revolutionary Guard, designated a terrorist organization by the US, has repeatedly threatened to close the strait and has now begun striking deeper into the Persian Gulf.

Key Perspectives

Shipping industry and insurers: They face soaring premiums and operational disruptions. Attacks are becoming routine, with vessels needing military escorts and crews at risk. The industry considers the current conditions unsustainable. Iranian authorities: They frame the campaign as blocking “illicit routes” and asserting sovereignty. Tehran appears willing to escalate despite the US blockade and naval presence, viewing control of Hormuz as a key lever. US and allied forces: They reject Iranian claims of closure and point to continued crude flows, but acknowledge rising risk. The US has stepped up briefings and escorts, though it has not expanded military action. Crude importers and consumers: For now, shipments continue, but at reduced volume and higher cost. A prolonged disruption could trigger price spikes and force importers to draw on strategic reserves or seek alternative suppliers.

What to Watch

  • The weekly tanker attack count and crude throughput through Hormuz: a further drop below 8 million bpd would signal serious disruption.
  • Any expansion of Iranian attacks beyond Hormuz into the wider Persian Gulf, as threatened.
  • US or allied military response: increased escorts or direct strikes on Iranian launch sites could escalate further.
  • Diplomatic moves, particularly any renewed negotiations or UN Security Council action on maritime security.

Sources

Zotpaper

Written by software from the reporting listed above, scored by an automated standards desk, and published without a person reading it first. If something here is wrong, tell the editor and it will be put right.

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