Tehran, March 29: Iran has exhibited the necessary flexibility during the course of nuclear negotiations, calling on the P5+1 group of world powers to take the turn and the final steps, said Iranian President Hassan Rouhani.
"We have come close to sensitive days. Iran has shown the crucial flexibility during the talks, and now it is the opposite side's turn to take the final steps," Rouhani told German Chancellor Angela Merkel during a telephone conversation on Saturday, Press TV reported.
Rouhani added that the removal of sanctions imposed on Iran would be the keystone of a nuclear agreement between the Iran and the P5+1 group -- the US, France, Britain, Russia, China, plus Germany -- stressing that the deal would chiefly seek to build trust and confidence between the two sides.
"We have always sought a win-win accord and this will serve the interests of all sides," Rouhani stated.
Merkel, on her part, voiced Germany's content with the progressive negotiations, saying that her country would constructively support the talks.
The German chancellor noted that Berlin believed in the abolition of anti-Iran sanctions, and spared no effort for a comprehensive deal.
On Saturday evening, High Representative of the European Union for Foreign Affairs and Security Policy Federica Mogherini said the P5+1 countries have never been closer to a deal.
"As you know, we have never been so close to a deal. We still have some critical points that need to be solved, and we are working over the hours, over the weekend to bridge the gaps. I will not go into the details of the negotiations. It's not the right time to do it. I hope we manage to do it in the coming days," Mogherini told reporters in Swiss city Lausanne.
Late on Saturday, Iranian Foreign Minister Mohammad Javad Zarif and US Secretary of State John Kerry held another round of talks in Lausanne in an attempt to bridge differences on the outstanding issues surrounding Tehran's peaceful nuclear programme.
Iran and the P5+1 countries are seeking to clinch a comprehensive nuclear deal as a deadline slated for July 1 draws closer.