Iranian Foreign Minister Mohammad Javad Zarif on Saturday reiterated national resolve on uranium enrichment right, IRNA reported.
Speaking to reporters, Zarif said, "We are discussing a three-step agreement and I assure you that [Iran's right to nuclear] enrichment will be included in any kind of deal."
"We have for four days been talking about details of an agreement about three steps deal, including the common goals, final image and preliminary measures."
Primary talks were easier since they were centered on issues over which there were agreements, but now we have reached the point of differences, the foreign minister said.
"We are not ready to take a step that may disregard Iranian nation's rights and interests. So, it is a difficult task that requires a lot of care," he added.
The Iranian chief negotiator said that presence of foreign ministers in Geneva signals the seriousness of negotiations so that they have felt that their presence in the course of talks is necessary.
He hoped that the arrival of foreign ministers in Geneva would be a sign of political resolve to reach a deal and a goodwill gesture from them.