Iran’s closure threats and attacks on the Strait of Hormuz during US-Israel war
Consensus Summary
The Strait of Hormuz—a critical chokepoint for 20 percent of global oil—has become a battleground after Iran threatened to block shipping following the US-Israel military campaign against Tehran. Both sources confirm Iran’s Revolutionary Guard has effectively closed the strait through threats, attacks, and selective rerouting, reducing vessel traffic from over 2,000 in mid-February to just 166 by early March. Confirmed attacks on at least 20 ships, including the US-owned Safesea Vishnu, demonstrate Iran’s use of drones and unmanned boats to disrupt trade, while US officials have called the strait unsafe. Consensus exists on the economic fallout, with rising oil prices and stranded ships, but sources diverge on Iran’s motives: the Guardian frames it as economic leverage, while ABC highlights Iran’s long-planned asymmetric warfare strategy. Iran’s new supreme leader, Mojtaba Khamenei, has prioritized controlling the strait, and analysts note the US faces greater pressure than Israel due to the global economic impact, though both governments remain committed to their military objectives.
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Key details reported by multiple sources:
- The Strait of Hormuz is a narrow waterway at the mouth of the Persian Gulf where 20% of the world’s oil normally flows, connecting the Gulf to the Arabian Sea.
- Iran has threatened to close the Strait of Hormuz since the US and Israel launched military operations against Iran in early 2024, with Revolutionary Guard (IRGC) radios broadcasting a message forbidding navigation through the strait.
- Iran has attacked at least 20 vessels in confirmed incidents since March 1, 2024, including unmanned speedboats ramming ships like the US-owned Safesea Vishnu and Greek-owned Zefyros.
- Shipping through the Strait of Hormuz dropped dramatically from over 2,000 vessels in mid-February 2024 to just 166 vessels by early March 2024, according to Marine Traffic data.
- The strait’s narrowest point is 30 kilometers wide, with two 3.2-kilometer-wide shipping lanes confined between Iran (north) and Oman (south), each country having 12 nautical miles of territorial waters.
- US Energy Secretary Chris Wright stated publicly that shipping through the Strait of Hormuz is ‘not safe’ as of early March 2024.
- Iran has rerouted some vessels through its own territorial waters (north of Larek Island) instead of the traditional Omani waters, per analysis by Farzin Nadimi.
Points of Difference
Details reported by only one source:
- Jillian Ambrose (Guardian’s energy correspondent) stated that Iran’s threats to set ablaze any tanker attempting to pass through the strait are effectively closing it for shipping owners and insurers.
- The Guardian’s podcast notes that Iran holds ‘a lot of the cards’ in the conflict, with economic turbulence potentially pressuring the US to reconsider its war strategy.
- The Guardian highlights the global economic ripple effect, stating that rising energy costs will increase the price of everyday goods and services for consumers.
- Iran’s Revolutionary Guard (IRGC) explicitly announced ‘all navigating through the Strait of Hormuz is forbidden’ shortly after the US-Israel war began.
- Iran’s strategy includes using drones, anti-ship missiles, and unmanned surface vessels to disrupt shipping, with attacks described as ‘unconventional’ and difficult to counter.
- Farzin Nadimi (Washington Institute senior fellow) explained that Iran’s internal debates after the 2023 12-day war led to a decision to threaten the strait this time to pressure global energy markets.
- Iran has selectively allowed passage for vessels linked to China, India, and Pakistan while blocking others, rerouting some through Iranian territorial waters to assert control.
- The attack on the Safesea Vishnu involved two unmanned speedboats packed with explosives, forcing the crew to abandon ship.
- Mojtaba Khamenei’s first statement as Iran’s new supreme leader identified the Strait of Hormuz as a key priority in the conflict with Israel and the US.
- Neil Quilliam (Chatham House) stated that Iran’s actions are ‘spoiling the war’ by spreading economic costs globally and having ‘quite some success’ at it.
Contradictions
Conflicting information between sources:
- The Guardian does not mention Iran’s explicit IRGC announcement forbidding navigation, while ABC explicitly reports this as a direct quote from Iranian radios.
- The Guardian focuses on economic pressure as the primary leverage Iran holds, while ABC emphasizes Iran’s military and asymmetric warfare tactics (drones, missiles) as the core strategy.
- ABC states Iran’s closure is a ‘last resort’ due to its own oil exports, but the Guardian implies Iran is using it as a calculated move to force the US to reconsider the war.
- The Guardian does not mention the 20 confirmed vessel attacks since March 1, while ABC provides this specific number and details about the Safesea Vishnu incident.
- ABC reports that Iran has halted *all* traffic except for ‘friends’ and its own tankers, while the Guardian does not specify which vessels are exempt from the closure.
Source Articles
Will the strait of Hormuz torpedo Trump's war? - podcast
Events in the narrow waterway are causing chaos around the globe. The Guardian’s energy correspondent, Jillian Ambrose , explains why The strait of Hormuz, a narrow stretch of water at the mouth of th...
Mosquito fleets, hidden caves and drones: The battle for the Strait of Hormuz
By moving so much of the war into the Strait of Hormuz and Persian Gulf, Tehran has hit its adversaries where it hurts the most and analysts warn that while the United States military is mighty, histo...