The United States waived sanctions on Iran for 60 days after the first talks under a nascent peace deal, while officials reported a sustained lull in fighting in Lebanon under the agreement aimed at ending hostilities across the region.

High-level negotiations in Switzerland seeking a permanent end to the Iran war ended with lower-level talks planned for the rest of the week.

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,…