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Talks between the US and Iran in Switzerland’s Burgenstock have stretched into Monday, with an American official saying that several key issues, including “all elements of the nuclear deal” have been discussed so far.

“We’ve had robust discussions on all elements of the nuclear deal,” the official said, speaking of a key sticking point between the two sides.

The official detailed that the discussion also covered “clarifying some of the confusing messaging from Iran on the Strait [of Hormuz] and building deconfliction mechanisms to ensure the strait will remain fully open. We have also worked through deconfliction mechanisms and enforcing the ceasefire in southern Lebanon”.

“We plan to continue working through each of these issues and using today’s work as a starting point for ongoing technical talks going forward,” the official said.