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U.S. and Iran Enter Multi-Party Talks in Switzerland Amid Regional Tensions

Talks expand to a four-party format in Switzerland as both sides trade warnings over proxy activity and maritime access.

June 21, 2026 at 6:00 PM

Diplomatic efforts to stabilize the U.S.-Iran conflict have transitioned to a broader four-party format in Switzerland, bringing together representatives from the U.S., Iran, Pakistan, and Qatar. U.S. Vice President JD Vance described the sessions in Bürgenstock and Lucerne as 'historic,' indicating that significant progress is being made toward solidifying the June 18 Islamabad Memorandum. Discussions are currently focused on implementation mechanisms, including the release of frozen Iranian funds through Qatari channels and the technicalities of Iranian oil exports. Despite the diplomatic track, significant friction remains regarding regional proxy activity and maritime security. President Trump has issued public warnings to Tehran to restrain 'highly paid proxies' in Lebanon, threatening intensified military action if hostilities persist. This rhetoric reportedly led to temporary disruptions in the Swiss talks, with Iranian officials briefly leaving the venue in protest. Furthermore, while Iranian-aligned sources claim the Strait of Hormuz has been closed by the IRGC, U.S. Central Command maintains that the waterway remains open to commercial traffic. The standoff is increasingly intersecting with economic pressures, as President Trump signaled his intent to impose U.S. 'tolls' on shipping in the Strait of Hormuz if a definitive agreement is not reached within a 60-day window. Iranian negotiators have countered that any permanent resolution is contingent on the U.S. fulfilling commitments related to Lebanese sovereignty. While the nuclear program remains a background issue, it has reportedly not been the primary focus of the initial implementation sessions.

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