An international think tank is urging Washington to hold private talks with Tehran over its nuclear program.
The Brussels-based International Crisis Group said on August 13 that a direct and confidential channel would enable greater bargaining flexibility than current public meetings between the six world powers and Iran.
The report also says that, to boost prospects for success, world powers should not impose new sanctions on Iran and not expect Iran's new president Hassan Rohani to offer major concessions.
One of the report's authors, Ali Vaez, says if Washington and Tehran reach a solution, other world powers "are likely to accept it, even if grudgingly."
The six world powers -- Britain, China, France, Germany, Russia, and the United States -- have held several rounds of talks with Tehran but with no sign of a breakthrough.
Based on reporting by ICG and Reuters