US Secretary of State John Kerry was set to arrive in Geneva Sunday for renewed talks with his Iranian counterpart on Tehran’s nuclear programme, after warning “significant gaps” remain ahead of a key deadline.
World powers are trying to strike a deal with Iran that would prevent Tehran from developing a nuclear bomb in return for an easing of punishing international economic sanctions.
Iran denies its nuclear programme has military objectives.
Kerry had been set to arrive in the Swiss city Sunday morning for two days of talks with Iranian Foreign Minister Mohammad Javad Zarif, but was delayed in London and only likely to arrive by late afternoon.
US and Iranian diplomats have been meeting in Geneva since Friday, and senior negotiators from the so-called P5+1 group of Britain, China, France, Russia, the United States and Germany were also expected to meet on Sunday to help drive the talks forward.