No major breakthroughs are expected at the talks that are to continue until the end of next week, but the pressure is on both sides to find ways to narrow the gaps.
EU foreign policy chief Catherine Ashton sat down with Iranian Foreign Minister Mohammad Javad Zarif at UN headquarters to kick off the talks, alongside negotiators from six powers of the so-called P5+1.
It was the first meeting between Iran and P5+1 - Britain, China, France, Russia, the United States plus Germany - since July when they decided to extend the deadline for a deal to November 24.
"Coming into New York, I think many of us were not optimistic," said the official, who asked not to be named.
"But it is clear that everyone has come here to go to work."
Iran has long denied it is seeking to develop a nuclear bomb, but the West is demanding Tehran agree to monitoring and safeguards while scaling back production of material that could be used for military purposes.
Negotiators say there are major hurdles to overcome but that holding talks in New York on the sidelines of the UN General Assembly will allow for some high-powered diplomacy to come into play.
US President Barack Obama last year held a historic phone call with Iranian President Hassan Rouhani, the first direct talks since the 1979 Islamic Revolution, but no contact is planned this time around.
Both leaders face strong domestic pressure to take a hard line on the nuclear issue, which has been a diplomatic headache for more than a decade until a deal was reached last year to try to break the logjam.
"This is an opportunity, because everybody's here," said the US official. "So we ought to make use of that to try to deal with all of these tough issues."
Western nations agreed to lift some sanctions against Iran last year in exchange for agreement from Tehran to curb some nuclear activities and to get to work on a comprehensive agreement.
You’ve reached your limit of {{free_limit}} free articles this month.
Subscribe now for unlimited access.
Already subscribed? Log in
Subscribe to read the full story →
Smart Quarterly
₹900
3 Months
₹300/Month
Smart Essential
₹2,700
1 Year
₹225/Month
Super Saver
₹3,900
2 Years
₹162/Month
Renews automatically, cancel anytime
Here’s what’s included in our digital subscription plans
Exclusive premium stories online
Over 30 premium stories daily, handpicked by our editors


Complimentary Access to The New York Times
News, Games, Cooking, Audio, Wirecutter & The Athletic
Business Standard Epaper
Digital replica of our daily newspaper — with options to read, save, and share


Curated Newsletters
Insights on markets, finance, politics, tech, and more delivered to your inbox
Market Analysis & Investment Insights
In-depth market analysis & insights with access to The Smart Investor


Archives
Repository of articles and publications dating back to 1997
Ad-free Reading
Uninterrupted reading experience with no advertisements


Seamless Access Across All Devices
Access Business Standard across devices — mobile, tablet, or PC, via web or app
