Muslim Press - A senior Iranian diplomat says a fair and comprehensive nuclear deal on Iran ' s nuclear program will strengthen regional and international peace and security.“[The ongoing] nuclear talks in Vienna are the most important international negotiations in the 21st century and we are trying to achieve a comprehensive and fair agreement which will help promote peace and security in the world, including in our region, ” Iran’s Deputy Foreign Minister for Asia and Pacific Affairs Ebrahim Rahimpour said while attending Shanghai Cooperation Organization(SCO) in the Russia. The nuclear talk has reached a very important stage and Iran is willing to settle its nuclear issues with the six world powers, he added. Nuclear negotiations between Iran and six world powers - the United States, France, Britain, China and Russia plus Germany -have extended until Monday. Iranian negotiators say they're determined to nail down a final deal that strengthens regional peace, however, they will not be doing open-ended negotiations.