TEHRAN- Iranian and American officials held constructive talks in Geneva on Thursday evening, a senior US official announced.

"It was, I would say, a constructive discussion," US State Department spokeswoman Marie Harf told reporters in Washington on Thursday.

The two sides held two rounds of talks in the morning and afternoon which lasted for five hours.

Iranian deputy Foreign Ministers Abbas Araqchi and Majid Takht Ravanchi and US Undersecretaries of State William Burns and Wendy Sherman held talks on narrowing the gaps about the nuclear dispute.

Last month, Iran and the G5+1 had over two weeks of negotiations in Vienna with no final agreement between the two sides, but they extended their July 20 deadline for a few more months.

During the talks, a senior member of the Iranian team of negotiators stressed that the excessive demands made by the other side are the root cause of the differences between Tehran and the world powers.

At the end of their talks, the two sides agreed to extend the talks till November 24 for brokering a final deal.

Zarif and Ashton in a joint statement after over two weeks of talks stressed the need for more efforts and time to reach an agreement with the world powers over Tehran's nuclear program.

Zarif and Ashton who presided the negotiating sides, emphasized at the end of Iran-G5+1 negotiations that they had held different sessions in different forms and in a constructive atmosphere to reach a final comprehensive agreement.

Due to certain differences over some fundamental issues the two sides agreed to extend the Joint Plan of Action by November 24, they added. (FNA)