“I would naturally be happy if there were talks between the United States and Iran,” she told reporters at the United Nations.

But she dismissed Iran’s demands that the United States lift all its sanctions before any high-level talks can take place.

“I think that’s unrealistic,” she said after separate talks with US President Donald Trump and Iranian President Hassan Rouhani.

Trump, addressing the General Assembly, threatened to impose even more sanctions on Iran after it was accused of carrying out an attack on Saudi Arabia’s oil infrastructure.

French President Emmanuel Macron and Japanese Prime Minister Shinzo Abe are also meeting with both leaders as part of an international push to defuse tensions.

Trump last year bolted from an international accord on Iran’s nuclear programme and infuriated the clerical regime by unilaterally trying to end all of its oil exports.