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EU says UN probe of Iran's alleged past nuclear weapons work will be essential part of deal

  • Director General of the International Atomic Energy Agency, IAEA, Yukiya Amano of Japan addresses the media during a news conference after a meeting of the IAEA board of governors at the International Center in Vienna, Austria, Monday June 8, 2015. (AP Photo/Ronald Zak)

    Director General of the International Atomic Energy Agency, IAEA, Yukiya Amano of Japan addresses the media during a news conference after a meeting of the IAEA board of governors at the International Center in Vienna, Austria, Monday June 8, 2015. (AP Photo/Ronald Zak)  (The Associated Press)

  • Director General of the International Atomic Energy Agency, IAEA, Yukiya Amano of Japan addresses the media during a news conference after a meeting of the IAEA board of governors at the International Center in Vienna, Austria, Monday June 8, 2015. (AP Photo/Ronald Zak)

    Director General of the International Atomic Energy Agency, IAEA, Yukiya Amano of Japan addresses the media during a news conference after a meeting of the IAEA board of governors at the International Center in Vienna, Austria, Monday June 8, 2015. (AP Photo/Ronald Zak)  (The Associated Press)

  • Director General of the International Atomic Energy Agency, IAEA, Yukiya Amano of Japan addresses the media during a news conference after a meeting of the IAEA board of governors at the International Center in Vienna, Austria, Monday June 8, 2015. (AP Photo/Ronald Zak)

    Director General of the International Atomic Energy Agency, IAEA, Yukiya Amano of Japan addresses the media during a news conference after a meeting of the IAEA board of governors at the International Center in Vienna, Austria, Monday June 8, 2015. (AP Photo/Ronald Zak)  (The Associated Press)

The European Union is telling Iran to cooperate with a stalled U.N. probe of suspicions that it worked on atomic arms if the country wants a nuclear deal that will see removal of sanctions.

The cautionary EU statement comes ahead of a June 30 target date for such an agreement. It was obtained by The Associated Press ahead of its delivery at a meeting of the U.N's International Atomic Energy Agency that opens Monday.

Iran denies any work on — or interest in — nuclear arms and has fended off IAEA demands for cooperation with its investigation. The EU statement says getting to the bottom of the allegations "will be essential" to a nuclear deal.

Iran also would have to accept limits on its present nuclear activities.