# Iran Fires on Indian Tanker, Closes Strait of Hormuz Again

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- **Published:** 2026-04-18
- **Updated:** 2026-04-19

BREAKING: IRGC GUNBOATS FIRE ON TANKER IN STRAIT OF HORMUZ • IRAN REVERSES COURSE, REIMPOSES "STRICT CONTROL" • INDIAN VLCC SANMAR HERALD FORCED TO TURN BACK • US BLOCKADE: 23 SHIPS TURNED AROUND • TRUMP: "WE'LL HAVE TO START DROPPING BOMBS AGAIN" • CEASEFIRE EXPIRES WEDNESDAY APRIL 22 • MOJTABA KHAMENEI: IRAN READY FOR "NEW BITTER DEFEATS" FOR ENEMIES • BREAKING: IRGC GUNBOATS FIRE ON TANKER IN STRAIT OF HORMUZ • IRAN REVERSES COURSE, REIMPOSES "STRICT CONTROL" • INDIAN VLCC SANMAR HERALD FORCED TO TURN BACK • US BLOCKADE: 23 SHIPS TURNED AROUND • TRUMP: "WE'LL HAVE TO START DROPPING BOMBS AGAIN" • CEASEFIRE EXPIRES WEDNESDAY APRIL 22 • MOJTABA KHAMENEI: IRAN READY FOR "NEW BITTER DEFEATS" FOR ENEMIES • Breaking developments Strait of Hormuz Maritime conflict Operation Epic Fury Ceasefire risk ExxonMobil Chevron OXY Lockheed RTX Northrop GD Dynamics Scorpio Frontline Teekay SPDR Gold VanEck DELTA United American Southwest Royal Carnival Norwegian amazon HD Invesco QQQ ARK iShares Conflict Intelligence Iran Fires on Indian Tanker, Closes Strait of Hormuz Again Four days until a ceasefire that may not hold. A supertanker fired on minutes after Iran cleared it to pass. Twenty percent of global oil and the price of your next tank of gas riding on what Trump decides Wednesday. By Sarah Brennan April 18, 2026 18 min read Updated 2:00 PM CT The shortest open strait in modern history lasted about 20 hours. On Friday morning, Iran's foreign minister declared the Strait of Hormuz "completely open" for commercial vessels. Oil prices crashed. Stocks hit all-time highs. Gas pump prices started dropping. President Trump celebrated on Truth Social. By Saturday morning, it was over. Two Iranian Revolutionary Guard gunboats opened fire on a tanker transiting the strait. Iran's joint military command announced that "control of the Strait of Hormuz has returned to its previous state." The Indian-flagged VLCC Sanmar Herald, a super tanker that had received prior clearance from Iran to pass, was forced to turn back under gunfire. A container ship reported rocket damage off the coast of Oman. The message from Tehran was clear: the blockade of Iranian ports ends, or the strait stays closed. 20 hrs Strait was "open" before Iran reversed 2 Indian tankers fired on Saturday 4 days Until ceasefire expires $5+/gal Possible gas ceiling if closure holds Priority Brief Updated 2:00 PM CT · Active What you need to know in 60 seconds § 01 WHAT Iran reclosed the Strait of Hormuz Saturday, 20 hours after opening it. IRGC gunboats fired on two Indian-flagged tankers, including the VLCC Sanmar Herald carrying 2 million barrels of Iraqi crude. § 02 BLOCKADE The US naval blockade of Iranian ports continues. 23 ships turned back since April 13. The US military is reportedly preparing to board Iran-linked tankers in international waters. § 03 DEADLINE The US-Iran ceasefire expires Wednesday, April 22 . Trump has threatened to resume bombing if no deal is reached. § 04 MARKETS Oil crashed 12% Friday on ceasefire optimism. Expect a reversal Monday. US gas prices had been dropping toward $3.85 and are likely to climb again if the strait stays closed. § 05 DIPLOMACY India summoned Iran's ambassador to protest the tanker attacks. The IMF has warned of global recession risk if the war resumes. Where the attack happened The Sanmar Herald was fired on by IRGC gunboats 20 nautical miles northeast of Oman, inside the "coordinated route" Iran designated for safe passage. About 20% of world oil normally flows through this 21-mile-wide chokepoint, ringed by Iranian anti-ship missile batteries. PERSIAN GULF GULF OF OMAN IRAN UAE OMAN (Musandam) Bandar Abbas Dubai Abu Dhabi 21 mi wide Iran's "coordinated route" IRGC MISSILE SITE position & launch illustrative MISSILE MISSED IRGC anti-ship capability · illustrative SANMAR HERALD FIRED ON Apr 18 · 20nm NE of Oman N § 01 What Happened: A Timeline Friday April 17, 2026 9:30 AM ET Iranian Foreign Minister Abbas Araghchi declares the Strait of Hormuz "completely open" for commercial vessels during the remaining ceasefire. Ships must use a "coordinated route" set by Iran. Oil plunges 12%. Trump posts "THANK YOU!" on Truth Social. Evening Trump says on Air Force One that he may not extend the ceasefire: "Maybe I won't extend it. So you have a blockade, and unfortunately we'll have to start dropping bombs again." Iran's parliamentary speaker warns strait "will not remain open" if US blockade continues. Saturday April 18, 2026 Early AM Iran's Fars News reports Tehran reversing its decision to open the strait, citing the US blockade. Iran's joint military command announces "strict control" has been reasserted. Morning UK Maritime Trade Operations reports two IRGC gunboats fired on a commercial tanker in the Strait of Hormuz, 20 nautical miles northeast of Oman. The tanker and crew are safe. No warning was given over radio before the attack. Later The Sanmar Herald, an Indian VLCC super tanker, is forced to turn back. A container ship reports rocket damage off Oman. Iranian Supreme Leader Mojtaba Khamenei posts on Telegram that his navy is ready to inflict "new bitter defeats" on enemies. § 02 The Attack on the Sanmar Herald The most alarming detail is not that Iran fired on a ship. Iran has fired on 21 merchant vessels since the war began. The alarming detail is that the Sanmar Herald had prior clearance to pass. The Indian-flagged Very Large Crude Carrier had received authorization from Iranian authorities to transit the strait. It was using the "coordinated route" Iran designated. It was not running sanctions. It was not flagged as hostile. It did what Iran asked ships to do. Two IRGC gunboats fired on it anyway. No radio warning. No prior notice. The tanker turned back. This is what shipping lawyers and insurers call "no-notice interdiction." It is the single most disruptive thing a state can do to commercial shipping. Because if Iran can fire on a cleared, approved vessel without warning, no shipowner can trust any Iranian clearance. And without that trust, the strait is effectively closed no matter what any press release says. "Iran has agreed to never close the Strait of Hormuz again. It will no longer be used as a weapon against the World!" President Trump, Truth Social — Friday, 24 hours before the attack § 03 The U.S. Blockade: 23 Ships Turned Back The U.S. naval blockade of Iranian ports began on April 13. U.S. Central Command now says 23 ships have been forced to turn around. The blockade is enforced by over 10,000 U.S. sailors, Marines, and airmen. More than a dozen warships and dozens of aircraft are deployed in rotation. The blockade costs Iran an estimated $400 million per day in lost oil revenue. Iran has roughly 13 days of oil storage capacity before its wells would have to be shut down. Shutting them in could cause permanent damage to the fields. That is the leverage the U.S. is applying. That is also why Iran has escalated back to gunboat attacks. The blockade squeeze, in numbers Every day the US blockade continues, Iran's options shrink. Oil storage runs out before the ceasefire even ends. US personnel 10,000+ sailors, Marines, airmen 10,000+ US warships 12+ enforcing blockade 12+ Ships turned back 23 since April 13 23 Iran daily loss $400M in oil revenue $400M Oil storage left 13 days before wells shut 13 days Until ceasefire ends 4 days 4 days Dueling Blockades: Who's Squeezing Whom Measure US Blockade of Iran Iran's Strait Restrictions Started April 13, 2026 February 28, 2026 Forces involved 10,000+ US personnel, 12+ warships IRGC Navy, gunboats, mines, drones Ships turned back 23 so far 21+ merchant vessels attacked Daily economic cost $400M to Iran ~20% of world oil disrupted Legal basis Disputed (blockade vs. quarantine) Violates UNCLOS transit rights Global opposition UK, EU, China, Russia oppose 49-nation Paris summit opposes § 04 Why Iran Reversed Course in 20 Hours Friday's announcement was tied to the Israel-Lebanon ceasefire that took effect Thursday evening. Iran opened the strait to signal goodwill. It lasted less than a day. Three things changed between Friday morning and Saturday morning. First, the U.S. blockade did not end. Trump's position was that the blockade stays "in full force" until a deal is 100% complete. Iran had expected some relief in exchange for opening the strait. It did not come. Second, Trump escalated the rhetoric. On Friday evening, he told reporters he might not extend the ceasefire and that "we'll have to start dropping bombs again." He also said the U.S. would obtain Iran's enriched uranium "in a much more unfriendly form" if talks failed. Iran's foreign ministry responded that enriched uranium is "as sacred as Iranian soil" and will not be transferred. Third, Iran's own hardliners pushed back. Parliamentary speaker Mohammad Bagher Qalibaf, who led the failed Islamabad talks, posted on X that the strait "will not remain open" while the blockade continues. Supreme Leader Mojtaba Khamenei posted that Iran's navy is ready for "new bitter defeats." By Saturday morning, the soft diplomatic opening had closed. Iran chose leverage over goodwill. § 05 The Ceasefire Clock: 4 Days Left The two-week ceasefire between the U.S. and Iran began on April 8. It expires on Wednesday, April 22. That is four days from now. Ceasefire countdown Day 10 of a 14-day ceasefire. Four days remain until April 22 deadline. No next round of peace talks scheduled. APR 8 Day 1 APR 9 2 APR 10 3 APR 11 4 APR 13 6 APR 15 8 APR 17 10 APR 18 TODAY APR 20 13 APR 22 END • Islamabad talks failed • US blockade began • Strait opened, reclosed • 4 days left Trump said Friday he may not extend it. "Maybe I won't extend it," he said. "But the blockade is going to remain. But maybe I won't extend it, so you have a blockade, and unfortunately we'll have to start dropping bombs again." No next round of peace talks has been scheduled. An Iranian deputy foreign minister told reporters in Turkey that "until we agree on the framework, we cannot set the date." He also said Iran is ready for "every possible scenario, either progress in the negotiations or returning to the military conflict." Mediators say three sticking points remain: Iran's nuclear enrichment program, the Strait of Hormuz, and compensation for wartime damages. Iran wants hundreds of billions in reparations. The U.S. wants Iran's enriched uranium stockpile transferred out of the country. Neither side has moved. Three sticking points, zero compromise Mediators are stuck on the same three issues that failed talks in Islamabad. Neither side has shifted position in the past week. 01 Enriched uranium US wants: Iran's stockpile transferred out of the country Iran says: "As sacred as Iranian soil" — will not transfer 02 Strait of Hormuz US wants: Guarantee strait stays open, no tolls, no restrictions Iran says: Strait stays closed while US blockade continues 03 Reparations US wants: No compensation for Iranian infrastructure damage Iran says: Hundreds of billions in wartime damages § 06 What This Means for You If you drive: Gas prices had just started dropping. The national average fell from $4.13 to $4.09 last week, and GasBuddy had projected a fall to $3.65-$3.85 over the weekend. That projection is now in doubt. If Iran keeps firing on tankers and the ceasefire ends Wednesday, expect gas prices to climb back fast. Prices in California could push back above $6. Fill up this weekend if you can. If you have summer travel booked in Europe: The flight cancellation risk is back. Europe has about six weeks of jet fuel left and 75% of imports come from the Middle East. SAS has already cancelled 1,000 flights. KLM is cutting 160 in May. Lufthansa shut down its CityLine subsidiary. If the strait stays closed past April 22, expect more airlines to announce summer cuts. Keep flexible tickets and travel insurance. If you have investments: Friday's all-time highs in the S&P and Nasdaq were priced on hope. Monday's open will reprice that hope. Energy stocks, airline stocks, and shipping stocks are the most exposed. Prediction markets gave only 26% odds that Hormuz fully normalizes by April 30 — Saturday's gunboat attack makes that number look generous. If you buy food or ship products: The fuel surcharges already in place are sticking. The USPS 8% surcharge, FedEx's 26.5% surcharge, Southwest's and United's bag fee hikes — none of those are rolling back. If conflict resumes, expect new surcharges and price increases on food, especially items that travel long distances or require refrigeration. If you have family in the military: The "drop bombs again" threat is not rhetorical. Thirteen U.S. service members have died in Operation Epic Fury so far. Iran has retained roughly half its missile launchers and thousands of attack drones according to U.S. intelligence. Renewed combat would likely be more intense than the initial campaign, not less. § 07 What This Means for Stock Markets and the Economy Markets priced in peace on Friday. The S&P 500 and Nasdaq hit all-time highs. Oil crashed 12%. Saturday's gunboat attack and reclosure will reverse those bets when markets reopen Monday. Here is what sectors are likely to move first and how the broader economy may react if the strait stays closed through the April 22 ceasefire deadline. Monday's market open: sectors most exposed Sector Impact: How Monday's Open Could Play Out Sector Likely direction Why it moves Energy producers XOM CVX OXY ↑ Strong up Crude prices reverse Friday's 12% crash. Shale producers gain pricing power. Defense contractors LMT RTX NOC GD ↑ Strong up War resumption risk rises. Missile replenishment orders likely if bombing resumes. Tanker operators STNG FRO TNK ↑ Strong up Shipping rates already elevated. Could double if Hormuz stays closed past April 22. Gold and precious metals GLD GDX ↑ Moderate up Safe-haven flows. Already up 2% Friday on ceasefire hope, reversal likely. US airlines DAL UAL AAL LUV ↓ Strong down Jet fuel costs crush margins. Europe routes face cancellation risk. Cruise lines RCL CCL NCLH ↓ Strong down Mediterranean and Middle East itineraries at risk. Summer bookings already softening. Consumer discretionary AMZN TGT HD ↓ Moderate down Higher gas prices cut discretionary spending. Retail margins compress. Tech and growth stocks QQQ ARKK ↓ Moderate down Higher inflation delays Fed rate cuts. Growth valuations compress on higher discount rates. Emerging markets EEM INDA FXI ↓ Strong down India, China, Japan most exposed to Hormuz. Dollar strength adds EM currency pressure. Table reflects likely direction based on historical oil-shock patterns and sector exposure. Not investment advice. The broader economic picture Inflation could reaccelerate. Energy makes up roughly 7% of the US Consumer Price Index. A sustained $15-per-barrel oil price increase would add about 0.3 percentage points to headline inflation over 60 days. Headline CPI had just started to stabilize. A reacceleration risks unwinding months of progress. The Fed's rate-cut path narrows. Fed Funds futures had priced in two to three rate cuts by year-end before Friday's events. An energy shock that pushes inflation back up likely delays those cuts indefinitely. Futures markets already adjusted late Friday after Trump's "drop bombs" comments. Global GDP takes a hit. Historically, every $10-per-barrel sustained increase in oil prices shaves roughly 0.1 percentage points off US GDP growth over 12 months. Europe, which imports more energy, typically takes a 2-3x larger hit. The IMF warned in March that a prolonged Iran war could trigger a global recession. Emerging markets face the hardest squeeze. India imports about 85% of its oil, much of it through Hormuz. China depends on the strait for roughly 50% of its crude imports. Japan relies on Hormuz for 70% of its energy. Currency pressure on the Indian rupee, Chinese yuan, and Japanese yen is likely if the closure extends past the ceasefire deadline. The dollar strengthens, which makes everything worse for emerging markets. The US dollar typically rises during oil crises as a safe haven. A stronger dollar increases the real cost of dollar-denominated debt for developing countries and adds further pressure on commodity prices, food imports, and central banks in the developing world. § 08 The Broader Stakes "Iran is ready for every possible scenario — either progress in the negotiations or returning to the military conflict." Saeed Khatibzadeh, Iranian Deputy Foreign Minister Two paths open Wednesday. If a deal is reached: Oil flows resume within days. Gas prices resume falling toward the $3.85 range GasBuddy projected. European airlines stop cutting summer capacity. The Fed's rate-cut path opens back up. But the damage does not unwind. Qatar's Ras Laffan LNG complex will take three to five years to repair. Europe still has about six weeks of jet fuel reserves. The Strait's reputation as a reliable trade route — the foundation of half a century of global energy pricing — is permanently altered. If bombing resumes: Iran has retained roughly half its missile launchers and thousands of attack drones, according to U.S. intelligence. Gulf bases, commercial shipping, and Qatar's LNG infrastructure are all within range. Mojtaba Khamenei has warned of "new bitter defeats." The IMF's March warning — that a prolonged Iran war could trigger a global recession — shifts from scenario to forecast. Thirteen U.S. service members have died in Operation Epic Fury so far. A renewed campaign would likely be more intense than the first. What's within Iran's strike range If the war resumes, Iran retains an estimated half of its missile launchers and thousands of attack drones. Three range bands put US bases, Gulf oil infrastructure, and commercial shipping lanes all within reach. IRAN Al Udeid base (Qatar) US 5th Fleet (Bahrain) Strait of Hormuz shipping Ras Laffan LNG (Qatar) Israel (2,000km IRBMs) Short-range (<500km): Gulf shipping, UAE, Qatar Medium-range (500-2,000km): US bases, Saudi oil Long-range (2,000km+): Israel, Eastern Med The Strait of Hormuz crisis is not a regional story. It is a test of whether one country holding a 21-mile-wide waterway can reshape the global economy. So far, the answer has been yes. Wednesday decides whether that stays true. Frequently Asked Questions Did Iran fire on Indian ships in the Strait of Hormuz? Yes. On April 18, 2026, two IRGC gunboats fired on the Indian-flagged VLCC Sanmar Herald and a second Indian vessel, the Jag Arnav. Both ships were forced to turn back. No injuries reported. India summoned Iran's ambassador to protest. A container ship was also hit by a rocket off Oman in a separate incident. What is the Sanmar Herald? An Indian-flagged Very Large Crude Carrier (VLCC) carrying nearly 2 million barrels of Iraqi crude oil. Fired on by Iranian gunboats without radio warning 20 nautical miles northeast of Oman. The captain was recorded saying: "You gave me clearance to go! You are firing now! Let me turn back!" Ship suffered bridge window damage and reversed course. Is the Strait of Hormuz open or closed right now? Closed. Iran briefly opened it on Friday, April 17 but reversed course less than 24 hours later after the US blockade did not end. Iran's military announced "strict management and control" has returned. About eight tankers crossed during the brief reopening before Iran reclosed it with gunboat fire. Why did Iran close the Strait of Hormuz again? Iran said it reversed course because the US naval blockade of Iranian ports did not end. Iran had expected blockade relief in exchange for opening the strait. When Trump refused, Iran reimposed "strict control" and called the US blockade "piracy" and a ceasefire violation. What is the US naval blockade of Iran? The US began blockading Iranian ports on April 13, 2026 after talks in Islamabad failed. Over 10,000 personnel and 12+ warships enforce it. CENTCOM says 23 ships have been turned back. Costs Iran $400 million per day. The US military is reportedly preparing to board Iran-linked tankers in international waters. When does the US-Iran ceasefire expire? Wednesday, April 22, 2026. Trump said April 18 he may not extend it and warned the US may "start dropping bombs again." No next round of peace talks has been scheduled. Will Trump bomb Iran again? He has threatened to resume strikes if no deal is reached by April 22. He warned the US would obtain Iran's enriched uranium "in a much more unfriendly form" if talks fail. Iran has rejected any transfer of enriched uranium, calling it "as sacred as Iranian soil." How many ships has Iran attacked since the war began? At least 21 confirmed attacks on merchant ships since February 28, 2026. The April 18 attacks on the Sanmar Herald and Jag Arnav bring the total higher. Targets have included tankers, container ships, and cruise ships. The IRGC has also laid sea mines and issued warnings forbidding passage. What does this mean for oil and gas prices? Friday's 12% oil crash is likely to reverse Monday. US gas prices had started dropping from $4.13 toward $3.65-$3.85. If the strait stays closed through April 22, expect prices to climb back toward $5 per gallon in expensive states. Fill up this weekend if you can. How will the Iran war affect the stock market? Friday's all-time highs in the S&P and Nasdaq were priced on ceasefire hope. Saturday's attack reverses that. Expect energy stocks (XOM, CVX, OXY), defense (LMT, RTX, NOC), tanker operators (STNG, FRO), and gold to rise Monday. Airlines (DAL, UAL, AAL), cruise lines (RCL, CCL), consumer discretionary, growth tech, and emerging markets are likely to fall. The Fed's rate-cut path narrows if inflation reaccelerates. What is the coordinated route through the Strait of Hormuz? A narrow northern corridor Iran designated on April 8 as the only "safe" passage. Iran warned mines may be present elsewhere. Ships must coordinate with Iranian authorities. EU diplomat Kaja Kallas warned any pay-for-passage scheme would violate international maritime law under UNCLOS. Sources Military.com — Iranian Gunboats Fire on Tanker in Strait of Hormuz as Iran Reimposes Restrictions. April 18, 2026. https://www.military.com/daily-news/2026/04/18/iranian-gunboats-fire-tanker-strait-of-hormuz-iran-reimposes-restrictions.html NBC News — Live updates: Iran says Strait of Hormuz has reverted to 'strict control.' April 18, 2026. https://www.nbcnews.com/world/iran/live-blog/live-updates-iran-says-strait-hormuz-reverted-strict-control-blames-us-rcna340767 Haaretz — Iranian Gunboats Reportedly Fire at Tanker Near Oman. April 18, 2026. https://www.haaretz.com/israel-news/israel-security/2026-04-18/ CBS News — Live Updates: Trump says U.S. is having "very good conversations" with Tehran. April 18, 2026. https://www.cbsnews.com/live-updates/iran-war-trump-israel-lebanon-ceasefire-hezbollah-strait-hormuz/ CNN — Live updates: Iranian gunboats fire on tanker after Strait of Hormuz closed again. April 18, 2026. https://www.cnn.com/2026/04/18/world/live-news/iran-war-trump-israel Newsweek — Trump issues new Iran ultimatum: 'We'll have to start dropping bombs.' April 18, 2026. https://www.newsweek.com/donald-trump-iran-ultimatium-strait-of-hormuz-ceasefire-11848548 The Hill — Trump warns US may 'drop bombs again' if no Iran deal. April 18, 2026. https://thehill.com/policy/international/5837535-donald-trump-warning-iran-ceasefire-end/ Wikipedia — 2026 Strait of Hormuz crisis. https://en.wikipedia.org/wiki/2026_Strait_of_Hormuz_crisis IranWarRoom.com is an independent conflict intelligence and analysis platform. Editorial content is produced with a commitment to neutrality. IranWarRoom does not advocate for any government, military, or political faction. All claims are sourced. Reader discretion is advised.

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