Iran says it is closing Strait of Hormuz again, but U.S. says ships are still moving

Iran said on June 20 that it is closing the Strait of Hormuz again, escalating tensions around one of the world’s most important shipping lanes. U.S. officials immediately pushed back, saying there was no sign of an actual physical shutdown and that oil shipments were still moving.

The dispute centers on whether Tehran has issued a warning or has begun enforcing a real closure. The Strait of Hormuz is a critical chokepoint for global oil and gas exports, so even an unconfirmed disruption can quickly rattle markets and raise shipping concerns.

What Iran said

According to reporting from Axios, Iran’s Khatam al-Anbiya Central Headquarters announced the renewed closure and tied the move to Israeli strikes in Lebanon. Iran said the attacks violated the ceasefire framework and blamed the U.S. for failing to respond.

The announcement followed a day of intensified violence in southern Lebanon, where the Guardian reported Israeli strikes killed at least 16 people.

U.S. pushback

Axios reported that a senior U.S. defense official said there were no Iranian military movements indicating the strait had actually been closed. The New York Post also quoted Vice President JD Vance saying there was no evidence of a shutdown and that shipments continued.

That leaves the central question unresolved: whether Iran has only made a political declaration or whether traffic in the strait is being turned away, delayed or rerouted.

Why it matters

Any real disruption in the Strait of Hormuz could affect global energy prices and shipping costs almost immediately. MarketWatch reported oil markets were already volatile amid the conflicting accounts and related reports of new transit requirements.

The announcement also lands as U.S. and Iranian technical talks in Switzerland were reported to be scheduled to begin Sunday in Bürgenstock, adding another diplomatic complication to an already fragile regional situation.

What to watch next

The key checkpoints now are whether commercial traffic is actually disrupted, whether Iran issues a follow-up statement clarifying the scope of the move, and whether maritime or defense officials confirm any enforcement at sea.

Also in view: whether the Switzerland talks proceed as planned and whether the fighting in Lebanon continues.