Prime Minister Shehbaz Sharif is expected to travel to Switzerland to participate in the second round of US-Iran talks, accompanied by a high-level delegation, sources said.

US Vice President JD Vance is also likely to attend.

Technical-level talks to implement the US-Iran deal ending the Middle East war are set to be held in Burgenstock, Switzerland, on Sunday, Pakistan’s foreign ministry confirmed.

“As a follow-up to the signing of the Islamabad Memorandum of Understanding, technical-level talks will be held in Burgenstock, Switzerland, on 21 June,” the ministry said in a statement, adding that Pakistani and Qatari mediators would participate alongside US and Iranian representatives.

An Iranian negotiating team departed for Switzerland on Saturday, state news agency IRNA reported, even as Iranian foreign ministry spokesman Esmaeil Baqaei warned the deal was “in trouble.”

US Vice President JD Vance said he expected to travel to Switzerland within the next few days, telling Fox News: “I expect that I will leave some time the next couple of days, but you know it’s always a delicate coordination dance.”

He said US negotiators Jared Kushner and Steve Witkoff were already on the ground handling “some of the technical elements” of the talks, and had reported that “things are going well.”

Vance’s comments came minutes before Iran announced it was again closing the Strait of Hormuz — the vital oil and gas shipping lane Tehran had blockaded for much of the war — citing Israeli strikes in Lebanon as a violation of the ceasefire deal.