Rafael Grossi, Director General of the International Atomic Energy Agency (IAEA), has called the level of Iran's cooperation on the nuclear program "completely unsatisfactory."
Grossi made this statement after participating in the nuclear conference in Iran.
He called on Tehran to take concrete measures to eliminate concerns related to the rapid development of Iran's nuclear program.
Iran and the IAEA continue negotiations on the agreement to expand inspections of the country's nuclear program.
"We have to be moving on," Grossi told reporters in Vienna on Tuesday. "The present state is completely unsatisfactory for me. We are almost at an impasse...and this needs to be changed."
