Director General of the International Atomic Energy Agency (IAEA) Yukiya Amano said on Monday that he had intensive talks with Iran's chief nuclear negotiator Saeed Jalili in "good atmosphere," the local media reported.

In the meeting, diverse topics including nuclear disarmament, peaceful use of nuclear energy and future cooperation were discussed, Amano was quoted as saying by the semi-official Mehr news agency.

Certain things were left to be discussed, but "they will not impede the progress of negotiations," said the chief of the UN watchdog according to the local satellite Press TV.

He said that "we held expansive and intensive talks in good atmosphere. For sure, the progress in the dialogue will have positive impact on the (upcoming) Iran-G5+1 (the five permanent UN Security Council members plus Germany) talks. Of course, these two are separate subjects, but can help each other," Mehr quoted Amano as saying.

"I am committed to solving the (Iranian nuclear) issue through dialogue," he added.

Asked why the IAEA does not want to develop a modality to solve the remaining issues of Iran's nuclear program, he said that "I don't want to enter the details, but the IAEA has its own viewpoints and Iran has its own (in this regard)," said Amano according to Mehr.

For his part, Jalili said that "we had good talks with Amano" in three areas, including nuclear disarmament, countering proliferation of nuclear weapons and peaceful use of nuclear energy for NPT (Non-Proliferation Treaty) signatories.

Jalili expressed hope that Iran and IAEA will have good cooperation in these three areas in future, according to state-run IRIB TV website.

Amano arrived in Tehran Monday for crucial nuclear talks. The UN nuclear watchdog said Friday in a brief statement that Amano would visit Tehran for nuclear talks and would discuss issues of mutual interest with high-level Iranian officials on Monday.

The talks would aim at pushing Iran to allow IAEA experts access to nuclear sites, people and documents that the agency hopes to inspect to address concerns that the country might have been working on nuclear weapons, said the media.

On Monday, head of the Atomic Energy Organization of Iran (AEOI) Fereidoon Abbasi and Amano discussed ambiguities in Iran's nuclear program and urged for expansion of ties, the local ISNA news agency reported.

In a meeting held in Tehran, the two sides discussed the existing problems raised by the West about Iran's nuclear program "openly" and suggestions were put forward for removing the ambiguities, said the report.

Abbasi outlined the diverse activities of the AEOI in agriculture, medicine and industry and called for "effective" cooperation with IAEA.

The IAEA chief also affirmed that the UN nuclear watchdog will further expand its cooperation with AEOI in diverse areas, according to ISNA.

After meeting with Amano on Monday, Iran's chief nuclear negotiator left Tehran for Iraqi capital of Baghdad where the new round of talks between Iran and the world powers over Iran's controversial nuclear program will be held on Wednesday.

On Monday, Iran's Foreign Minister Ali-Akbar Salehi expressed hope that the talks in Baghdad would achieve "positive" outcomes and would end in good results, Press TV reported.

In the meantime, Iranian lawmakers issued a statement on Sunday urging the G5+1 to respect Iran's nuclear rights.

The leaders of Group of Eight (G8) major industrial nations said on Saturday that they remain united in their "grave concern" over Iran's disputed nuclear program, while urging Tehran to address such concern without delay.

"We remain united in our grave concern over Iran's nuclear program. We call on Iran to comply with all of its obligations under relevant UNSC (United Nations Security Council) resolutions and requirements of the AEA Board of Governors," the G8 leaders said in a declaration issued after their summit at the Camp David, the U.S. presidential retreat in the state of Maryland.