Iran and the International Atomic Energy Agency (IAEA) agreed to continue their talks regarding the Islamic republic's nuclear program after three days of meetings, the semi-official Fars news agency reported on Tuesday.

Fars also said the newly-concluded meetings were "positive and constructive" and that the next round of the talks has been scheduled but did not specify the date and location.

On Sunday, a high-ranking IAEA delegation headed by chief inspector Herman Nackaerts arrived in Tehran for a visit to Iran's nuclear facilities.

However, the talks were held behind closed doors and no details about the process or outcome were released.

Last November, the board of the IAEA adopted a resolution on Iran's disputed nuclear program, which called for intensified dialogue to find solutions to unresolved issues.

However, Iran has said the resolution will not stop its nuclear program that is peaceful in nature despite the West's accusation of military purposes.