Tehran, Aug 18, IRNA - The United Nations nuclear watchdog's deputy director general, Olli Heinonen, held talks with senior Iranian nuclear officials on Monday.

Deputy Head of Iran's Atomic Energy Organization (IAEO) Mohammad Saeedi and Iran's Permanent Ambassador to IAEA Ali Asghar Soltaniyeh were also present in the meeting.

Heinonen, arrived in Tehran early Monday upon an invitation of the IAEO.

Heinonen's previous talks with Iranian officials were held during his two-day visit to from August 7-8.

He had described his talks with senior Iranian officials as "constructive".

IAEA Director General Mohamed ElBaradei is due to present a report on Iran's nuclear program and the country's cooperation with the agency to the IAEA's Board of Governors in early September.