By Nandita Bose, Yomna Ehab and Humeyra PamukWASHINGTON/DUBAI/ZURICH, June 19 (Reuters) - Switzerland said U.S. talks with Iranian negotiators on a pact to end the Middle East conflict would not take place on Friday, while Vice President JD Vance dropped plans to travel there, fuelling uncertainty whether a lasting truce can be found."The logistics of these negotiations have never been simple or predictable," a White House spokesperson said in a statement on Thursday.

Switzerland announced Friday that planned talks following up on the deal to end the Middle East war had been postponed, hours after US Vice President JD Vance's departure for the…

The trip was canceled after Iranian officials argued the meeting was unnecessary, as the preliminary peace deal document had already been signed by Trump and Iran’s President.