Mediators Qatar and Pakistan say the Bürgenstock talks produced working groups and a Lebanon deconfliction cell, even after Iran's walkout over a Trump threat.

The first round of talks under the interim U.S.-Iran truce opened near Lucerne even as Trump warned of fresh strikes and Tehran said it had closed the Strait of Hormuz again.

As Vance met Iran's delegation above Lake Lucerne, Trump threatened to bomb Iran again, and Tehran refused to give ground on uranium enrichment.

Vice President JD Vance's trip to Switzerland was scrubbed and Iran held back its delegation, just two days after a signed ceasefire that the war in Lebanon is already straining.