The first round of negotiations between the United States and Iran since the two sides signed a preliminary agreement to halt their war was due to begin in Switzerland on Sunday, with the conflict in Lebanon threatening the deal.

A formal signing ceremony and talks planned for Friday in Switzerland between Iran and the United States were called off, as fighting between Israel and Hezbollah intensified in…

(Bloomberg) -- The US and Iran have postponed the start of their negotiations over a permanent peace deal and restricting the Islamic Republic’s nuclear program.

First round of planned US-Iran talks in Switzerland on Friday were postponed