The negotiations follow up on the memorandum of understanding the parties agreed earlier in June and are being held in Bürgenstock, Switzerland. Among other things, the issue of Iran's nuclear programme is on the agenda.
A US diplomat told reporters on Monday night that the Iranian delegation had participated in “intensive discussions on all aspects of the nuclear deal,” and that the talks were expected to continue into the early hours. The talks so far have reportedly also focused on “clarifying” Iran’s statements about the Strait of Hormuz.
US President Donald Trump, who did not travel to Switzerland, warned Iran of new attacks on Sunday.
"Iran must immediately stop its well-paid proxies in Lebanon from causing trouble. If they do not, we will strike them again very hard, just like last week, only harder," he wrote, where "proxies" refers to the Iran-backed Shia militia Hezbollah.
This prompted Iran's chief negotiator Mohammad Bagher Ghalibaf to say threats would not be taken into account in the negotiations and that Tehran is prepared to defend itself in the event of any attacks.
