Iran and the UN nuclear agency are looking to hold a new meeting in mid-October, despite Tehran's atomic chief suggesting the watchdog has been infiltrated by "terrorists," diplomats told AFP on Tuesday.

Four envoys said that plans were being made for the meeting, which would follow one between Iran's nuclear agency chief Fereydoon Abbasi Davani and International Atomic Energy Agency (IAEA) head Yukiya Amano in Vienna on Monday.

The IAEA made no mention of dates for more talks but Amano said in a statement issued on Tuesday that he had told Abbasi Davani that the agency was "committed to continued dialogue" and ready to meet "in the near future."

He stressed however after several rounds of fruitless talks this year, the last on August 24 in Vienna, that "a structured approach to clarify all issues related to Iran's nuclear program, including those related to possible military dimensions, needs to be agreed and implemented as soon as possible."

These meetings are aimed at clarifying the agency's suspicions that prior to 2003, and possibly since, Iran had a structured program of activities the UN agency said were "relevant to the development of a nuclear explosive device."

Previous rounds took place in May and in June. Amano also visited Tehran in May, as did a team led by chief inspector Herman Nackaerts at the start of the year, returning however with no deal. Iran denies working on the bomb.