US-Iran talks begin in Switzerland as Iran keeps Strait of Hormuz closed

U.S. and Iranian negotiators began talks in Switzerland on June 21 under immediate pressure from a renewed dispute over the Strait of Hormuz, after Iran said it had closed the waterway again and U.S. forces said they were still watching traffic there.

The meetings are taking place at Bürgenstock, near Lucerne, and focus on Tehran’s nuclear program and an interim deal that was signed last week, according to the reporting. The framework is moving on a 60-day timeline, with commercial vessels expected to pass through the strait without a charge during that period.

Talks begin under shipping pressure

The closure claim landed just before the diplomacy got underway. Iran said on June 20 that it had shut the Strait of Hormuz again, linking the move to Israel’s actions in Lebanon and the fragile ceasefire there.

U.S. Central Command disputed that account and said it was monitoring the situation to keep traffic moving through the waterway. That leaves open a basic practical question: whether the closure is operational or mainly declaratory.

The Strait of Hormuz is one of the world’s most important energy chokepoints, carrying about a fifth of globally traded oil and natural gas. Any sustained disruption would ripple far beyond the immediate talks, affecting shipping routes, prices and broader market confidence.

What the negotiators are covering

Vice President JD Vance said the agenda includes progress on the nuclear issue and the Lebanon ceasefire, widening the talks beyond the immediate nuclear file. The reporting also says the deal structure raises questions about sanctions relief, access to frozen Iranian assets and future access to the waterway.

The Iranian side has signaled that little can be achieved if the fighting in Lebanon continues. That makes Lebanon part of the diplomatic track, not just a side issue, and helps explain why the talks are beginning under such visible strain.

Who is at the table

The talks include mediators from Pakistan and Qatar, reflecting the broader diplomatic structure around the negotiations. The reporting also identifies senior figures on both sides, including JD Vance, Abbas Araghchi, Steve Witkoff and Jared Kushner.

Other key names linked to the effort include Pakistan Prime Minister Shehbaz Sharif, Swiss officials and U.S. Central Command. The Iranian delegation has also been described as including political, oil and central bank officials, underscoring the economic dimension of the negotiations.

Why it matters now

The immediate stakes are not limited to diplomacy. If the Strait of Hormuz remains disrupted in practice, the impact could reach global energy flows almost immediately, especially if shipping companies or insurers treat the closure claim as real.

The unresolved issue is whether the Iranian announcement changes actual traffic or primarily serves as leverage in the talks. For now, the competing statements from Tehran and CENTCOM leave that answer unsettled.

What comes next will be watched closely: whether the Switzerland talks produce concrete progress on nuclear terms or sanctions relief, whether the Lebanon ceasefire becomes part of a narrower deal, and whether Iranian or U.S. officials clarify the status of the strait.