It is too soon to say if Iran has a more positive attitude as it comes back to nuclear talks aimed at saving a landmark nuclear deal, US State Department spokesperson Jalina Porter told reporters Monday.

In a video briefing, Porter was asked about remarks from Iran’s top negotiator at the talks, Ali Bagheri Kani, who said over the weekend that progress had been made that could pave the way for more serious negotiations.

“It’s just too soon to tell whether Iran has returned to a more constructive approach at this moment,” she said.