Iranian Foreign Minister Mohammad Javad Zarif and his US counterpart John Kerry started a second round of talks Wednesday in an attempt to find solutions to the sticking points in the way of striking a deal between Iran and P5+1.
Iranian deputy foreign ministers, Abbas Araqchi and Majid Takht-e Ravanchi, as well as US Undersecretary of State for Political Affairs Wendy Sherman are also present in the meeting.
Earlier Wednesday, Zarif said there were still a number of issues that needed to be resolved, calling on the six major powers involved in talks with the Islamic Republic over Tehran's nuclear energy program to show more flexibility.
"There are a number of issues that are left to be resolved. They require, as I have said, the recognition by all parties that they need to exhibit political will and flexibility in order to move forward. Iran has exhibited that political will. Iran has shown its readiness to engage with dignity" Zarif told reporters in the Swiss city of Lausanne on Wednesday evening.
The top Iranian diplomat also called upon representatives from the five permanent members of the UN Security Council - the United States, France, Britain, Russia and China - plus Germany to seize the moment, saying that "it is time for our negotiating partners to seize the moment and use this opportunity which may not be repeated."
He added that the two sides are "just trying to resolve the problems and move forward."
Zarif said he has not yet decided to extend his stay in Lausanne for Iran's nuclear talks for another day. "We haven't decided yet, we have to see how much progress we make today and then we will decide based on that."
He said progress had been made between Iran and major powers over Tehran's nuclear program, but both sides could have moved forward further.
"I'm not dissatisfied but we could have made more progress obviously everybody wanted to have resolved this issue by last night but we still need to do some more work," Zarif stated.