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Chief of UN agency monitoring Iran's nuclear program to go to Tehran Thursday, say Iran media

  • Director General of the International Atomic Energy Agency, IAEA, Yukiya Amano of Japan arrives at the Palais Coburg where closed-door nuclear talks with Iran take place in Vienna, Austria, Tuesday, June 30, 2015. Talks continued Tuesday on Iran's nuclear program. (AP Photo/Ronald Zak)

    Director General of the International Atomic Energy Agency, IAEA, Yukiya Amano of Japan arrives at the Palais Coburg where closed-door nuclear talks with Iran take place in Vienna, Austria, Tuesday, June 30, 2015. Talks continued Tuesday on Iran's nuclear program. (AP Photo/Ronald Zak)  (The Associated Press)

  • Iranian Foreign Minister Javad Zarif, center,laughs during a meeting with U.S. Secretary of State John Kerry at a hotel in Vienna, Austria, Tuesday June 30, 2015. Pushing past a deadline, world powers and Iran extended negotiations for a comprehensive nuclear agreement by a week on Tuesday as the U.N. nuclear agency prepared to announce Tehran had met a key condition. (Carlos Barria/Pool via AP)

    Iranian Foreign Minister Javad Zarif, center,laughs during a meeting with U.S. Secretary of State John Kerry at a hotel in Vienna, Austria, Tuesday June 30, 2015. Pushing past a deadline, world powers and Iran extended negotiations for a comprehensive nuclear agreement by a week on Tuesday as the U.N. nuclear agency prepared to announce Tehran had met a key condition. (Carlos Barria/Pool via AP)  (The Associated Press)

  • U.S. Secretary of State John Kerry and U.S. Under Secretary for Political Affairs,, Wendy Sherman, rear, meet with Iranian Foreign Minister Javad Zarif at a hotel in Vienna, Wednesday July 1, 2015. The head of the U.N. agency tasked to monitor a nuclear deal is traveling to Tehran to meet with Iranian President Hassan Rouhani, the agency said Wednesday. (Carlos Barria/Pool Photo via AP)

    U.S. Secretary of State John Kerry and U.S. Under Secretary for Political Affairs,, Wendy Sherman, rear, meet with Iranian Foreign Minister Javad Zarif at a hotel in Vienna, Wednesday July 1, 2015. The head of the U.N. agency tasked to monitor a nuclear deal is traveling to Tehran to meet with Iranian President Hassan Rouhani, the agency said Wednesday. (Carlos Barria/Pool Photo via AP)  (The Associated Press)

Iranian media report that the head of the UN agency tasked to monitor a nuclear deal with Iran will visit Tehran Thursday to discuss an impasse over interviewing experts he suspects may have worked on atomic arms.

They say that Yukiya Amano of the International Atomic Energy Agency will "receive Iran's alternative proposal to nuclear scientists' questioning."

An IAEA probe of the allegations has been essentially stalemated for nearly a decade, with Iran dismissing them as phony evidence planted by the U.S. and Israel.

Washington insists that the agency be given greater powers in its investigations as part of any overall nuclear deal. That includes questioning people possibly involved in the alleged weapons work — something Tehran says rejects.

The IAEA Wednesday had no immediate comment on the reported trip.