Iran's senior envoys left talks in Switzerland on Monday after a marathon negotiating session with the United States, state media reported, as mediators claimed progress towards a definitive US-Iran deal.The host nation said conditions were set for technical talks to immediately follow, with the sides at the beginning of a 60-day period to secure a long-term settlement.Last week, Tehran and Washington signed a memorandum of understanding laying the groundwork for the negotiations, after a 40-day war that was followed by weeks of an inconclusive and oft-breached ceasefire.

Iran and the United States agreed Monday to set up communications lines to keep the vital Strait of Hormuz open and end fighting in Lebanon, mediators said, after their first…

"Encouraging progress has been made including the creation of a mechanism for further technical talks,” says joint statement by mediators.