BY EMMANUEL OGBONNA
Iran temporarily closed the Strait of Hormuz on Tuesday during live-fire military exercises, escalating tensions in one of the world’s most strategically vital waterways even as Iranian and American negotiators met for another round of indirect talks over Tehran’s nuclear program.
Iranian state media reported that missiles were launched toward the narrow maritime corridor and that the strait would be shut for several hours due to safety and navigational concerns linked to the drills. The announcement marked a rare and forceful step by Tehran at a moment of heightened friction with Washington, which has been reinforcing its military presence in the region.
The Strait of Hormuz, a narrow channel connecting the Persian Gulf to the Gulf of Oman, is a critical artery for global energy markets. Roughly one-fifth of the world’s oil supply transits the waterway. Any disruption to shipping there carries the potential to reverberate across international markets and deepen geopolitical instability in an already volatile region.
It was not immediately clear to what extent maritime traffic was halted. Iran has frequently conducted military exercises in and around the strait, sometimes causing temporary slowdowns. However, formally declaring a closure, even if limited in duration, represented a notable escalation amid ongoing diplomatic efforts.
Iran’s Supreme Leader, Ayatollah Ali Khamenei, issued a stark warning as the drills unfolded. In remarks carried by state television, he cautioned that even the most powerful militaries could suffer crippling blows, adding that advanced naval assets were vulnerable to countermeasures capable of sinking them. He also warned against attempts to predetermine the outcome of negotiations.
The military display coincided with renewed indirect negotiations between Iran and the United States in Geneva. The talks were facilitated by Oman, a longtime intermediary between the two adversaries, and held at the residence of Oman’s envoy. The discussions followed an earlier round earlier this month.
Iran’s delegation was led by Foreign Minister Abbas Araghchi, who struck a more conciliatory tone after the session concluded. Speaking at a U.N. disarmament forum in Geneva, Araghchi said a “new window” had opened for diplomacy and expressed hope that a sustainable, negotiated settlement could be reached.
He emphasized that Iran sought an outcome that would safeguard the interests of all relevant parties and promote regional stability. At the same time, he reiterated that Iran remained fully prepared to defend itself against any act of aggression, warning that consequences of an attack would extend beyond Iran’s borders.
Araghchi also confirmed he had met with Rafael Grossi, director-general of the International Atomic Energy Agency, on Monday. The discussions reportedly focused on the agency’s role in verifying compliance should a new agreement be achieved.
On the American side, the delegation was led by special envoys Steve Witkoff and Jared Kushner. A U.S. official familiar with the discussions said there had been progress, though substantial differences remained. Iranian negotiators are expected to present more detailed proposals in the coming weeks in an effort to narrow gaps.
Vice President JD Vance described the talks as productive in certain respects but noted that the administration had established firm conditions that Tehran had yet to fully address. President Donald Trump, who withdrew from a previous nuclear agreement during his first term, has repeatedly threatened to use military force if Iran refuses to curb its nuclear activities. Tehran has vowed to respond in kind to any attack.
The diplomatic maneuvering unfolded against a backdrop of expanded U.S. naval deployments. The Pentagon recently ordered the USS Gerald R. Ford, the world’s largest aircraft carrier, to head toward the Middle East. It is expected to join the USS Abraham Lincoln and its accompanying destroyers, which have been operating in the region for weeks.
U.S. defense officials confirmed that the Ford and its escort vessels — including the USS Mahan, USS Bainbridge and USS Winston Churchill — are currently transiting the Atlantic and are more than a week away from Middle Eastern waters. The repositioning follows recent incidents, including the reported downing of an Iranian drone that approached the Lincoln and an attempt by Iranian forces to impede a U.S.-flagged vessel in the Strait of Hormuz.
Energy markets reacted cautiously to developments. Oil prices, which had risen in recent weeks amid fears of confrontation, fell after the conclusion of the latest round of talks. Analysts said the decline reflected guarded optimism that diplomacy might avert a wider conflict and potentially ease sanctions constraints on Iranian exports.
Regional governments have expressed concern that a direct clash between the United States and Iran could ignite a broader conflict, particularly as the Middle East continues to grapple with the aftershocks of last year’s 12-day war between Israel and Iran. During that conflict, U.S. forces struck Iranian nuclear facilities, reportedly damaging centrifuge infrastructure used to enrich uranium to near weapons-grade levels. Israeli strikes also targeted Iran’s air defenses and segments of its ballistic missile program.
Before that war, Iran had been enriching uranium up to 60% purity — a level technically short of weapons-grade but significantly above civilian energy requirements. Tehran maintains that its nuclear program is for peaceful purposes and has resisted demands to halt enrichment activities on its soil or relinquish its stockpile of highly enriched uranium.
As negotiations resume under the shadow of military maneuvers and sharpened rhetoric, both sides appear to be balancing coercive pressure with cautious diplomacy. Whether the temporary closure of the Strait of Hormuz was a calibrated signal or a prelude to further escalation remains uncertain, but the episode underscored the fragile equilibrium between confrontation and compromise in one of the world’s most sensitive geopolitical flashpoints.
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