The Atomic Energy Organization of Iran (AEOI) announced it had completed the first step of its agreement with the IAEA to resolve outstanding issues relating to three nuclear sites. Tehran sent the IAEA a document on March 20 with its explanation for the presence of nuclear material at the sites. The Agency will review the document and submit follow-up questions before issuing a final report by June. AEOI head Mohammad Eslami claimed that one radioactive particle detected by the IAEA does not exist in Iran, and blamed Israel for "sowing doubts" about Iran's nuclear program.