ZURICH (AP) — The U.S. push to quickly begin high-stakes talks with Iran hit a snag just two days after the signing of an agreement that opens a 60-day window to negotiate a permanent understanding about Iran’s nuclear program while getting oil traffic moving through the Strait of Hormuz back to prewar levels.

Vice President JD Vance had been prepared to make an overnight flight Friday to meet with his Iranian counterparts at a mountainside resort in the tiny Swiss village of Obbürgen and begin the technical talks.