VIENNA (AP) — The head of the U.N. atomic agency is urging Iran to provide answers over suspicions that Tehran worked on nuclear arms.

Speaking at Monday’s general conference of his International Atomic Energy Agency, Yukiya Amano said Iran had implemented some measures in an agreement meant to give the agency a deeper knowledge of Iran’s nuclear program.

But they have been mostly in areas that have nothing to do with the alleged weapons work. Amano says two of the measures remain to be implemented.

Iran says it does not want nuclear arms and never worked toward them. But the agency says it has collected about 1,000 pages of information that point to attempts to develop such weapons.

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