UN atomic watchdog chief Rafael Grossi arrived in Iran on May 6, where he is expected to speak at a conference and meet officials for talks on Tehran's nuclear program. The visit comes at a time of heightened regional tensions and with the International Atomic Energy Agency (IAEA) criticizing Iran for lack of cooperation on inspections and other outstanding issues. Grossi is scheduled to meet Iran's Foreign Minister Hossein Amir-Abdollahian, as well as the Islamic republic's nuclear chief, Mohammad Eslami.