Iran Warns of Full Closure of Hormuz Strait

Tehran has issued a stern warning that it could entirely close the Strait of Hormuz if its nuclear power facilities are attacked, signalling a sharp escalation in tensions with the United States and Israel. The announcement follows threats made by US President Donald Trump on Saturday, heightening concerns over regional stability and global energy security.

IRGC Issues Formal Warning

On Sunday, the Islamic Revolutionary Guard Corps (IRGC) released an official statement, declaring that any assault on Iran’s nuclear installations would trigger a complete shutdown of the Hormuz Strait. The statement emphasised that the strait would remain closed until damaged facilities were fully restored.

Brigadier General Ebrahim Jolfagari, speaking on state television, said:
“Any attacks on Iran’s energy infrastructure will be met with decisive and proportional retaliation.”

The IRGC highlighted potential targets for retaliation, including:

  • Israel’s electricity grids, fuel facilities, and IT infrastructure
  • Companies in the region with American shareholders
  • Power plants in neighbouring countries hosting US military bases

The warning underlines Iran’s strategy of deterrence and asymmetric response, demonstrating its willingness to target both regional and international assets linked to perceived adversaries.

Strait of Hormuz Status

Since the joint US-Israel strike on 28 February, Iran has effectively restricted traffic through the strait. Without explicit Iranian permission, commercial vessels and oil tankers are largely barred from transit. The waterway, which carries a significant portion of the world’s oil supply, is a critical chokepoint for global energy markets.

The partial closure has caused sharp volatility in crude prices, which have surged above $100 per barrel, prompting urgent interventions from Washington and other international stakeholders. Iran has made clear that vessels associated with the United States or Israel attempting passage would be considered hostile targets.

International and NATO Response

According to Mehr News Agency, Iran’s representative to the International Maritime Organization (IMO), Ali Mousavi, confirmed that the strait remains open to vessels that meet strict safety protocols. However, ships linked to adversary nations are not permitted to transit.

President Trump has repeatedly called on NATO allies to deploy naval forces to guarantee safe passage, but most nations have refrained, citing the high-risk environment. Only six countries—the United Kingdom, France, Germany, Italy, the Netherlands, and Japan—have expressed readiness to contribute to securing navigation, though no deployments have been confirmed.

Strategic and Economic Implications

The IRGC’s warning raises the stakes for energy security and regional stability. Analysts caution that a full closure of the strait could have profound effects:

FactorCurrent SituationPotential Impact
Strait StatusPartially closed; restricted to non-adversary vesselsGlobal shipping delays, fuel shortages
Crude Oil PricesSurpassing $100 per barrelIncreased inflation, higher energy costs
Targeted RetaliationIsrael’s infrastructure, US-linked companies, neighbouring power plantsRegional escalation, potential international conflict
International ResponseLimited support from six countriesInsufficient to guarantee uninterrupted shipping
IRGC Threat LevelFull closure if nuclear sites attackedSevere disruption of global energy markets

The warning highlights Iran’s readiness to use energy chokepoints as leverage and signals that any strike on its nuclear facilities could trigger a multi-front regional crisis.

Global observers continue to monitor developments closely, noting that a full-scale escalation could disrupt international energy supply chains and significantly heighten tensions between Iran, the United States, and their respective allies in the Middle East.

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