Iran Claims Strait of Hormuz Closed as US Peace Talks Begin in Switzerland

The fragile ceasefire between the United States and Iran faces its first major stress test just days after being signed. On Saturday, Iran's military command announced it was closing the Strait of Hormuz to vessel traffic, citing ongoing Israeli military operations in Lebanon as a breach of the newly minted memorandum of understanding.[2][3]

The 14-point interim agreement, signed by President Donald Trump and Iranian President Masoud Pezeshkian, was designed to pause the devastating US-Iran war that began earlier this year. A core element of the deal required an end to hostilities across multiple fronts, including Lebanon.[2][4]

However, Israel—which is not a signatory to the US-Iran pact—has continued its campaign against the Iran-backed militant group Hezbollah. Overnight strikes in southern and eastern Lebanon killed at least 16 people, prompting Tehran to declare the ceasefire violated.[1][7]

In retaliation, Iran's Khatam al-Anbiya Central Headquarters declared the vital maritime choke point closed. State media warned that this was merely a "first step" and that further measures would follow if the "aggression" continued.[3][7]

The United States military immediately disputed Tehran's claim. US Central Command (CENTCOM) stated that "Iran does not control the Strait of Hormuz" and reported that traffic was flowing normally.[2][6]

According to CENTCOM spokesperson Capt. Tim Hawkins, 55 merchant ships carrying more than 17 million barrels of oil successfully transited the international waterway on Saturday. US forces remain "present and vigilant" to ensure safe passage.[2][3][4]

The stakes for global energy are immense. The Strait of Hormuz is one of the world's most critical economic arteries. Before the outbreak of the war, roughly a quarter of the globe's seaborne oil trade and 20 percent of its liquefied natural gas passed through the narrow corridor.[2]

Any disruption—real or perceived—sends immediate shockwaves through global energy markets. Oil prices had just begun to stabilize after the US lifted its blockade on Iranian ports as part of the interim deal.[4]

Despite the escalating rhetoric and military posturing over the waterway, diplomatic efforts are surprisingly moving forward. High-level delegations from both Washington and Tehran converged on the Bürgenstock Resort in Switzerland over the weekend.[6][8]

US Vice President JD Vance departed Joint Base Andrews on Saturday to lead the American delegation, joining special envoy Steve Witkoff and presidential adviser Jared Kushner, who were already on the ground.[5][8]

"We'll have a couple of days of talks to try to get this thing kicked off in the right way," Vance told reporters before his departure, noting that the United States "has all the cards" following the recent military conflict.[5]

The Iranian delegation, led by parliament speaker Mohammad Bagher Ghalibaf and Foreign Minister Abbas Araghchi, also arrived in Zurich late Saturday. Their presence underscores that sanctions relief and economic recovery remain central to Tehran's calculations.[4][8]

The technical talks are being heavily facilitated by international mediators. Qatari and Pakistani officials are participating directly in the negotiations, attempting to bridge the massive trust deficit between the two adversaries.[5][6]

A major hurdle for the negotiators will be addressing the Israel-Hezbollah conflict, which threatens to derail the broader US-Iran settlement. An emergency session specifically focused on Lebanon has reportedly been added to the Switzerland agenda.[6]

US intelligence agencies have reportedly warned the Trump administration that Israeli Prime Minister Benjamin Netanyahu remains intent on continuing military operations against Hezbollah, a posture that directly conflicts with Iran's demands for a comprehensive regional truce.[2]

Adding another layer of complexity, President Trump issued a new warning on Saturday. He threatened to impose American tolls on ships passing through the Strait of Hormuz if a final nuclear and peace deal is not reached within the 60-day ceasefire window.[4][5]

Trump stated the funds would serve as payment for "services rendered as the Guardian Angel to the countries of the Middle East," a demand that is likely to face fierce opposition from both Iran and international shipping conglomerates.[4]

The coming days in Switzerland will determine whether the 14-point memorandum can evolve into a durable political settlement or if the region will plunge back into open warfare. For now, the world watches the waters of the Persian Gulf, waiting to see if the diplomatic off-ramp holds.[8]