Back
WORLD

Iran closes Strait of Hormuz again amid U.S. blockade; ships fired upon as India vessels cross

Iran reversed its earlier reopening of the Strait of Hormuz and closed it again, firing on ships attempting to transit. The IRGC navy warned vessels to remain at anchor and warned crossing would be treated as cooperation with the enemy. Indian-flagged tankers crossed the strait despite the closure, while several others turned back amid heightened regional tensions.

Why It Matters

The Strait of Hormuz is a key chokepoint for global oil shipments; closures and gunboat incidents raise the risk of wider conflict and affect energy markets, shipping lanes, and regional diplomacy.

Timeline

29 Events

Oil price surge amid crisis

April 18, 2026

The crisis contributed to a surge in global oil prices, with a barrel of oil rising above $100 at points.

Trump comments on negotiations

April 18, 2026

Trump said on Saturday that there are very good conversations going on with Iran and that it's working out.

US-proposed settlement discussions update

April 18, 2026

The SNSC said new proposals from the US were under review and had not yet been responded to; peace talks held earlier in the month ended without an agreement.

SNSC: ceasefire violation and halted reopening

April 18, 2026

Iran's Supreme National Security Council said this violated the ceasefire agreement and that it would stop reopening the strait while the ceasefire remained in place.

MarineTraffic: some vessels pass through as strait briefly opens

April 18, 2026

Data from MarineTraffic showed some vessels were able to make it through the strait while it was briefly open; others were forced to change their route after access was denied by the IRGC.

India summons Iranian ambassador over shooting incident

April 18, 2026

India's foreign ministry summoned the Iranian ambassador to convey deep concern at the shooting incident involving two Indian-flagged ships in the Strait of Hormuz.

Reports of attacks on vessels in the Strait area

April 18, 2026

Two Iranian gunboats opened fire on a tanker in the Strait; a container ship was hit by an unknown projectile off the north-eastern coast of Oman, damaging some containers; at least two merchant vessels were hit by gunfire as they tried to cross.

IRGC Navy warns no vessel may move from anchorage

April 18, 2026

The IRGC Navy warned that no vessel is to move from its anchorage in the Persian Gulf or the Sea of Oman, and that approaching vessels will be targeted.

Iran closes Strait of Hormuz again to commercial vessels

April 18, 2026

Iran says it is closing the Strait of Hormuz again to commercial vessels and that any ship approaching it will be targeted.

Two-week ceasefire due to expire

April 18, 2026

A two-week ceasefire currently in effect is due to expire on April 22.

Trump says naval blockade will continue until peace deal

April 17, 2026

U.S. President Donald Trump said the naval blockade would continue until a peace deal was agreed between the two countries.

Iran's foreign minister announces temporary reopening of Strait

April 17, 2026

Iran's foreign minister announced that the Strait of Hormuz had been temporarily reopened.

US begins enforcing blockade on Iran; ships turned away

April 13, 2026

The United States began enforcing the blockade of Iranian ports, turning away 23 ships since the enforcement began on April 13.

Conflict escalates as US-Israel attack on Iran triggers war

February 28, 2026

The conflict began when the US and Israel attacked Iran on February 28.

Blockade pushes ships to turn back; count reaches 23

April 18, 2026

Since the U.S.-imposed blockade on Iranian ports and coastal areas, 23 ships have complied with U.S. forces' orders to turn back toward Iran.

Hezbollah official: negotiations with Israel are a failure

April 18, 2026

Senior Hezbollah official Mahmud Qamati said Lebanon’s direct talks with Israel are a failure and not of concern to the group.

Lebanese president vows to prosecute those targeting UN peacekeepers

April 18, 2026

Lebanese President Joseph Aoun vowed to prosecute those who targeted French UN peacekeepers, after a deadly attack that killed one and injured three.

UK container vessel attacked near Strait of Hormuz

April 18, 2026

The British military said a container vessel was attacked near the Strait of Hormuz; an unknown projectile struck the vessel and some containers were damaged.

UNIFIL: non-state actors behind deadly attack in southern Lebanon

April 18, 2026

UN peacekeepers said non-state actors were thought to be behind a deadly attack on their personnel in southern Lebanon, allegedly Hezbollah.

Lebanon discusses direct talks with Israel after ceasefire

April 18, 2026

Lebanon's President Joseph Aoun and Prime Minister Nawaf Salam discussed preparations for direct negotiations with Israel in the wake of the ceasefire in the Lebanon-Israel conflict.

Turkey signals ongoing Iran-U.S. talks; complex issues persist

April 18, 2026

Turkish Vice-President Cevdet Yilmaz said there are many complex issues and that talks between Iran and the United States would continue.

Trump warns Iran over Strait closure and blackmail

April 18, 2026

U.S. President Donald Trump warned Iran not to blackmail Washington with its stance on the Strait of Hormuz.

Iran reiterates Strait closure and accuses U.S. of violations

April 18, 2026

Tehran said it had again closed the Strait of Hormuz, alleging that the United States violated certain understandings reached between the two sides.

India protests to Iranian envoy over crossing incident

April 18, 2026

India summoned Iranian envoy Mohammad Fathali after two Indian vessels had to reverse course in the Strait following the firing incident, lodging a strong protest.

UKMTO reports gunboat engagement near Oman

April 18, 2026

The United Kingdom Maritime Trade Operations center said a tanker was approached by two Iranian Revolutionary Guard Corps gunboats and fired upon about 20 nautical miles northeast of Oman.

India-flagged vessels reverse course near chokepoint

April 18, 2026

MarineTraffic data showed India-flagged tankers Sanmar Herald, Desh Vaibhav and Desh Vibhor, along with the bulk carrier Jag Arnav, reversing course near the chokepoint, bringing the total India-flagged ships in the Persian Gulf to 14.

Desh Garima crosses the Strait of Hormuz

April 18, 2026

The Indian-flagged oil tanker Desh Garima reportedly crossed the Strait of Hormuz, the 10th India-flagged vessel to cross the strait since early March.

Iran closes Strait of Hormuz again; fires on ships approaching

April 18, 2026

Iran reversed its reopening, closed the Strait of Hormuz again, and fired on ships attempting to pass. The IRGC navy warned that no vessel should move from its anchorage and that approaching the strait would be treated as cooperation with the enemy and targeted.

Iran announces Strait of Hormuz opened for commercial traffic

April 17, 2026

Iran announced that it had opened the Strait of Hormuz for commercial traffic.