In a sharp escalation of tensions in the Persian Gulf, two Indian-flagged vessels—one a VLCC supertanker carrying approximately 2 million barrels of Iraqi crude—were fired upon by Iranian Revolutionary Guard Corps (IRGC) gunboats in the Strait of Hormuz on April 18, 2026. The ships, identified as the Sanmar Herald and Jag Arnav, were forced to reverse course and turn back. Crews are reported safe, with only minor damage to one vessel.
This incident comes as Iran has reimposed strict military control over the Strait, effectively closing it again to most commercial traffic after a brief and fragile reopening tied to a U.S.-Iran ceasefire. Iranian forces broadcast warnings that passage is denied until the U.S. lifts its naval blockade of Iranian ports. Ship-tracking data and maritime intelligence confirm multiple vessels turned back today, with reports citing at least four Indian tankers (Sanmar Herald, Desh Garima, Desh Vaibhav, Desh Vibhor) and two Greek vessels failing to transit.
Broader Context: Strikes, Turnbacks, and the Hormuz Chokepoint
The Strait of Hormuz, through which roughly 20% of global seaborne oil (about 21 million barrels per day pre-crisis) and significant LNG volumes flow, has been a flashpoint since the U.S.-Israel-Iran conflict intensified in late February 2026. Iran initially blockaded the strait in response to strikes, leading to:
Attacks on shipping: Ship-tracking data (Kpler) shows 22 vessels attacked since the war began, with traffic plummeting from ~100 transits/day pre-war to just 6-7 recently. The Sanmar Herald marks the latest in a pattern that includes other tankers hit near the strait.
Turnbacks and stranded vessels: Today’s events echo prior incidents. Bloomberg and marine traffic data report several tankers (oil, LPG, chemicals) U-turning in recent days/weeks. The U.S. Central Command noted 23 vessels forced to turn around since its blockade began on April 13. Overall, nearly 1,900 ships have been stranded or disrupted at various points, with Indian-flagged vessels particularly affected (dozens initially stuck in the Gulf).
Back-and-forth reopenings: Iran briefly declared the strait “fully open” earlier this week during the Lebanon ceasefire window, but re-closed it hours later citing U.S. non-compliance. Conflicting statements from Tehran, Washington, and vessel trackers have created chaos.
This is not isolated—history is repeating elements of the 1980s Tanker War, but on a faster, more leveraged scale amid modern geopolitics.
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