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International Relations April 23, 2026 5 min read Daily brief · #12 of 23

Israel-Iran LIVE: Trump orders U.S. Navy to 'shoot, kill' small boats laying mines in Strait of Hormuz

Iran's Islamic Revolutionary Guard Corps (IRGC) Navy seized two foreign-flagged container vessels — MSC Francesca and Epaminondas — in the Strait of Hormuz, ...

GS Paper 1 (Geography) GS Paper 2 (International Relations Internal Security)

What Happened

  • Iran's Islamic Revolutionary Guard Corps (IRGC) Navy seized two foreign-flagged container vessels — MSC Francesca and Epaminondas — in the Strait of Hormuz, with 22 Indian seafarers confirmed onboard the two ships; the Ministry of Ports, Shipping and Waterways confirmed all were safe.
  • The IRGC also deployed additional naval mines in the strait, escalating an already tense naval standoff with US forces operating a blockade of Iranian ports since April 13, 2026.
  • The US administration ordered the US Navy to "shoot and kill" any Iranian vessel caught laying mines in the Strait of Hormuz, marking one of the sharpest direct military warnings in the ongoing crisis.
  • The USS Navy has been operating a naval blockade of Iranian ports; US Central Command reported directing 31 Iran-linked vessels to turn back or return to Iranian ports since the blockade began.
  • Two Indian-crewed ships came under fire in the strait — Vessel Euphoria (Panama-flagged, 21 Indian crew) and Vessel Epaminondas (Panama-flagged, 1 Indian crew) — prompting the Ministry of External Affairs to press Iran for unimpeded passage.

Static Topic Bridges

Strait of Hormuz: Geography and Strategic Significance

The Strait of Hormuz is a narrow waterway located between Iran to the north and the Musandam Peninsula of Oman to the south. At its narrowest point it is approximately 34 kilometres (21 miles) wide, with tanker traffic confined to two 3-kilometre-wide shipping lanes separated by a 2-kilometre buffer zone. It is roughly 167 kilometres long.

  • Approximately 20% of global oil and liquefied natural gas exports transit the strait daily, making it the world's most critical oil chokepoint.
  • In 2025, nearly 15 million barrels per day of crude oil transited the strait — roughly 34% of all global seaborne crude trade (IEA data).
  • The shipping lanes lie primarily in Omani territorial waters and partially in Iranian territorial waters.
  • The Gulf Cooperation Council (GCC) states — Saudi Arabia, UAE, Kuwait, Qatar, Bahrain, and Oman — are entirely dependent on the strait for oil exports.

Connection to this news: Iran's seizure of vessels and mine-laying directly threatens global energy supply chains; any prolonged closure or disruption would spike global oil prices and interrupt India's crude supply, since West Asia accounts for roughly 40% of India's crude imports.

UNCLOS and Transit Passage Rights (Article 38)

The United Nations Convention on the Law of the Sea (UNCLOS), adopted in 1982 and in force since 1994, establishes the legal framework for navigation through international straits. Article 38 of UNCLOS guarantees the right of "transit passage" — the freedom of navigation and overflight for all ships and aircraft through straits used for international navigation, making no distinction between merchant or military vessels. Coastal states cannot suspend transit passage for any reason (Article 44).

  • Transit passage differs from "innocent passage" (applicable in territorial seas) in that it cannot be suspended and applies to both surface ships and submarines (which may transit submerged).
  • Although Iran signed UNCLOS in 1982, it has not ratified the treaty, largely because it rejects the transit passage rule; Iran's position is that the strait's navigation is subject to its sovereign discretion.
  • The transit passage regime is nonetheless regarded as customary international law binding on all states, regardless of UNCLOS ratification status.
  • The US and Israel are also non-parties to UNCLOS, but invoke the transit passage regime to assert freedom of navigation through the strait.

Connection to this news: Iran's blockade of the strait and seizure of commercial vessels directly contradicts the transit passage regime under customary international law; this legal dispute underpins the naval standoff between US forces and the IRGC.

IRGC: Iran's Parallel Military Structure

The Islamic Revolutionary Guard Corps (IRGC) was established in 1979 following the Iranian Revolution, created as a parallel military force loyal to the Supreme Leader, separate from the conventional Iranian Armed Forces. The IRGC Navy (IRGCN) has jurisdiction over Iran's Persian Gulf and Strait of Hormuz operations.

  • The IRGC has a broad mandate covering domestic security, foreign operations (through its Quds Force), and naval operations in the Persian Gulf.
  • The IRGCN has previously conducted ship seizures, harassment of tankers, and drone attacks on vessels — tactics that differ from conventional naval warfare.
  • The IRGC has been designated a Foreign Terrorist Organization (FTO) by the United States since 2019.
  • In 2026, the IRGCN has launched more than 21 confirmed attacks on merchant ships since the conflict escalated.

Connection to this news: It is the IRGC Navy — not Iran's conventional navy — that is conducting the mine-laying and vessel seizures in the Strait of Hormuz, reflecting the IRGC's primary role as a coercive instrument of Iranian statecraft in the region.

India's Maritime Security Interests and the Protection of Seafarers

India has the world's largest pool of maritime officers, with over 240,000 seafarers — the largest globally — serving on ships across international waters. The protection of Indian nationals on foreign-flagged vessels falls under consular protection obligations, coordinated through the Ministry of External Affairs and the Ministry of Ports, Shipping and Waterways.

  • India is not a direct party to the US-Iran conflict but has significant exposure: West Asia accounts for one-sixth of India's exports, about half its crude oil imports, and nearly two-fifths of inward remittances.
  • India's diplomatic posture in such crises typically balances its strategic autonomy tradition with economic interests and protection of its diaspora.
  • The Directorate General of Shipping (DGS) under the Ministry of Ports, Shipping and Waterways monitors the safety of Indian crew on international vessels.

Connection to this news: The confirmed presence of 22 Indian seafarers on targeted vessels forces India to actively engage diplomatically with Iran even amid its neutral posture on the broader conflict, illustrating how non-state nationals can draw India into interstate disputes.

Key Facts & Data

  • Strait of Hormuz width at narrowest point: ~34 km (21 miles)
  • Global oil transit through Hormuz: ~20% of all oil and LNG exports; ~34% of seaborne crude trade
  • IRGC attacks on merchant vessels since escalation: 21+ confirmed
  • US naval blockade operational since: April 13, 2026
  • Iranian vessels turned back by US Navy: 31 (as of April 23, 2026)
  • Indian seafarers on vessels seized/fired upon: 22 (all confirmed safe as of April 23, 2026)
  • India's crude oil import dependency: ~81.4% of domestic requirements
  • Share of India's crude from West Asia: approximately 40%
On this page
  1. What Happened
  2. Static Topic Bridges
  3. Strait of Hormuz: Geography and Strategic Significance
  4. UNCLOS and Transit Passage Rights (Article 38)
  5. IRGC: Iran's Parallel Military Structure
  6. India's Maritime Security Interests and the Protection of Seafarers
  7. Key Facts & Data
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