Yukiya Amano, head of the International Atomic Energy Agency, is set to meet Thursday with Iranian President Hassan Rouhani in Tehran in a bid to reach agreement on outstanding verification issues as negotiators work on a nuclear deal.

"Discussions are expected to address ongoing cooperation between the IAEA and the Islamic Republic of Iran under the Framework for Cooperation, and how to accelerate the resolution of all outstanding issues related to Iran's nuclear program, including clarification of possible military dimensions," the IAEA said in a statement on Wednesday.

RELATED: Why critics are happy with delay in Iran nuclear talks

Iran is required by U.N. Security Council resolutions to give the IAEA a full accounting of its past work involving nuclear weapons, but has not yet done so. The issue has dogged international negotiations in Vienna on limiting Iran's nuclear program to peaceful purposes.

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