Delegates of the six world powers, known as the P5Ư group, started another round of nuclear talks with Iran in Geneva, Switzerland, Thursday.
In the two-day talks, the world powers are expected to seek a " first step" deal with Iran on solving the nuclear problem, though both sides say an agreement is far from certain.
In the previous round of talks, held Oct 15-16, Iran proposed a plan as a basis for negotiation but details of the proposal were not disclosed.