Iran Reopens Hormuz Threat as Vance Arrives in Switzerland for High-Stakes Talks
Vice President JD Vance arrived in Switzerland on Sunday for the next phase of negotiations with Iran, a day after Tehran declared the Strait of Hormuz closed again in response to Israeli military strikes on Lebanon. The move sent shockwaves through global energy markets and cast doubt on the fragile interim peace agreement signed less than a week ago.
Tehran Declares Waterway Shut; Washington Disputes Claim
Iran’s joint military command announced Saturday that the strait would remain closed as long as Israel continued its offensive operations in Lebanon and as what it described as U.S. failure to uphold commitments under the ceasefire framework. Iranian state television reported that “subsequent steps have been planned” if aggression continues. On Saturday, Israeli strikes in southern Lebanon killed at least 16 people, including two children, according to Lebanese authorities cited by The Associated Press. Lebanese authorities said seven people remained trapped beneath rubble in Nabatiyeh and nearby villages.
The U.S. military rejected Iran’s characterization of the waterway’s status. “Iran does not control the Strait of Hormuz,” said Navy Captain Tim Hawkins, a spokesperson for U.S. Central Command, in a statement to Reuters. “Traffic continues to flow, and U.S. forces are monitoring the situation to ensure this remains the case.” Vice President Vance confirmed the U.S. assessment during his remarks, noting that tanker traffic had rebounded sharply following the ceasefire agreement. “We actually got 16 million barrels of oil out of the Strait of Hormuz yesterday,” Vance told reporters. “That is a record going back to even before the conflict.”
Diplomatic Talks Resume Under Mounting Pressure
Despite the conflicting accounts over the strait’s status, delegations from Washington and Tehran convened at the Burgentstock resort overlooking Lake Lucerne. “The U.S. delegation, led by U.S. Vice President JD Vance, the Iranian delegation, led by the Speaker of the Iranian Parliament, Mohammad Bagher Ghalibaf, and the mediators, Pakistan and Qatar, have arrived at the Burgentstock,” Switzerland’s Federal Department of Foreign Affairs said in a statement. “Talks between the parties are set to begin during the course of the morning,” the ministry added.
The meeting represents the first face-to-face session since President Donald Trump and Iranian President Masoud Pezeshkian signed a memorandum of understanding on June 17, ending nearly four months of hostilities in the region. Under the terms of that interim agreement, both sides committed to a 60-day window to finalize technical details on the strait’s management, Iran’s nuclear program, and the broader Lebanon ceasefire. Iran’s Tasnim news agency, citing a source close to the Iranian negotiating team, said the strait would not be reopened until waivers allowing the sale of Iranian oil were issued and until the Lebanon ceasefire was fully respected.
Nuclear Program and Ceasefire Remain Key Obstacles
Beyond the Hormuz dispute, Iran’s nuclear program is expected to feature prominently in this week’s discussions. The vice president signaled that advancing talks on the nuclear issue was a priority. “I hope to make progress on the nuclear issue and the Lebanon ceasefire issue,” Vance told reporters before boarding his flight to Switzerland.
International monitors are also closely tracking developments. Rafael Grossi, director general of the International Atomic Energy Agency, met with Swiss Foreign Minister Ignazio Cassis at the talks “to take stock of recent developments regarding Iran, the path ahead and the important role of the IAEA,” Grossi said in a post on X. “At this critical moment, it’s important to give diplomacy every opportunity to succeed.” Jared Kushner, Trump’s son-in-law, and Special Envoy Steve Witkoff are also present in Switzerland working through technical details of the agreement.
Global Stakes and Energy Market Jitters
The Strait of Hormuz handles roughly 20 percent of the world’s daily oil supply, making any prolonged disruption a matter of global economic concern. The original closure in April sent oil prices spiking and triggered widespread anxiety among energy traders. Analysts say the conflicting signals from Tehran and Washington underscore the fragility of the current ceasefire architecture. “What we are seeing is the fundamental tension between a political agreement and a military reality on the ground,” said one regional analyst who spoke on condition of anonymity because they were not authorized to brief media. “Until both sides agree on enforcement mechanisms for the Lebanon ceasefire, the Hormuz issue will remain a bargaining chip.”
Trump issued a stark warning about the future of the waterway. In a post on Truth Social late Saturday, the president said the U.S. would consider imposing transit tolls on ships using the strait if the 60-day deadline for a final agreement expires without a deal. “There will be NO TOLLS in the Hormuz Strait for 60 days during the Cease Fire Period, and there will be NO TOLLS after the 60-day period has expired, unless they are imposed by and for the United States of America, should the deal not be completed,” Trump wrote.
What Comes Next
Negotiators face a compressed timeline. The 60-day window runs through mid-August, and both sides must resolve disputes over nuclear inspections, oil sale waivers, and the mechanics of the Lebanon ceasefire before any final agreement can be presented. Regional analysts warn that a breakdown in talks could undo months of diplomatic work and restart a conflict that displaced hundreds of thousands of people. The coming days will test whether the pledges made in Geneva can withstand the pressures of competing military interests on the ground.