Shibbir Ahmed, New York — Iran has said the strategically vital Strait of Hormuz will remain closed despite efforts to revive regional diplomacy, as a planned meeting between Iran and Gulf states was postponed and concerns over global energy supplies continued to grow.

Iranian Foreign Minister Abbas Araghchi said an agreement reached with Oman over arrangements for maritime traffic through the strait would not mean the waterway would be reopened. Tehran has linked any reopening to the United States returning to commitments made under an earlier peace understanding.

The planned meeting in Oman, which was expected to bring together Iran, Iraq and Gulf Arab states to discuss navigation through the Strait of Hormuz, was postponed on Monday. Oman’s Foreign Minister Badr Albusaidi said the delay was intended to allow more time to build consensus among the participating countries.

The diplomatic setback comes as tensions around the region’s major energy routes continue to rise. Shipping traffic through Hormuz has fallen sharply, with only a small number of commodity vessels recorded passing through the waterway over the weekend, well below the recent daily average.

The Strait of Hormuz is one of the world’s most important energy chokepoints, carrying a significant share of global crude oil and liquefied natural gas supplies. Disruption to the route has already contributed to a sharp increase in oil prices, with Brent crude rising above $107 a barrel on Monday.

Iran has also warned vessels that violate its maritime protocols. Its Strait Authority issued an updated list of 77 vessels accused of violating Iranian rules and warned that sanctioned ships could face penalties including fines, detention or confiscation.

The stalled diplomacy has increased fears that the disruption could persist, putting further pressure on global energy markets, shipping costs and economies dependent on Gulf oil and gas.

WASHINGTON DC — The United States and Iran exchanged attacks around the strategically vital Strait of Hormuz, sharply escalating tensions after the U.S. military struck three Iranian oil tankers following Iranian missile attacks on American Navy vessels.

The U.S. Central Command said American forces targeted three Iranian crude-oil carriers on Saturday after Iran’s Islamic Revolutionary Guard Corps launched ballistic missiles toward two U.S. Navy ships. No American personnel were reported injured in the attacks.

The strikes targeted vessels including a tanker near Iran’s Kharg Island, a major hub for the country’s oil exports. The escalation has raised fresh concerns about the security of commercial shipping through the Strait of Hormuz, one of the world’s most important energy corridors.

Iran subsequently claimed that its forces struck an unmanned U.S. vessel attempting to enter the Strait of Hormuz. The United States had not immediately confirmed the Iranian claim, according to The Associated Press.

Iranian authorities have also threatened further action against vessels they consider to be using unauthorized routes in the region. The exchange of attacks comes as military tensions between Washington and Tehran continue to intensify following the collapse of an earlier ceasefire.

The Strait of Hormuz is a critical global energy chokepoint, and disruption there could have consequences far beyond the Middle East. Shipping traffic through the waterway has already fallen significantly amid the conflict, while oil markets remain highly sensitive to developments in the region.

The latest confrontation also comes as OPEC+ prepares to meet Sunday. The group is expected to maintain its current oil-production policy amid continuing disruption to energy exports through the Strait of Hormuz.

The situation remains fluid, with both sides issuing competing claims about attacks on vessels. Independent confirmation of some Iranian military claims was not immediately available.