The US and Iran were locked in late-night talks in Switzerland aimed at turning a shaky interim deal to reopen the Strait of Hormuz into a permanent settlement to end their more than 100-day war.
A US official denied reports that Iranian negotiators had cut short the peace talks, saying they were expected to continue through the night.
The negotiations in a Swiss mountain resort focused primarily on the Israeli-Hizbollah conflict in Lebanon that has threatened to derail diplomatic efforts to implement the memorandum of understanding signed by the US and Iran on Wednesday.
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