Iran will respond to concerns about the nuclear swap deal it signed with Turkey and Brazil in May in a letter to the International Atomic Energy Agency (IAEA) on Monday, dpa quoted Turkey's Foreign Minister Ahmet Davutoglu as saying on Sunday. "Iran notified us that they will submit a letter to the IAEA tomorrow morning," Davutoglu said after meeting his Brazilian counterpart Celso Amorim and Iranian Foreign Minister Manouchehr Mottaki in Istanbul. Turkey and Brazil mediated and persuaded Iran during a meeting in Tehran in May to store 1,200 kilograms of its low enriched uranium in Turkey until the fuel for Tehran's research reactor is delivered. The Tehran agreement was, however, rejected by world powers as insufficient. The United Nations Security Council then imposed a new resolution and fresh sanctions on Iran last month in response to its nuclear programs, which is suspected of having military intentions. Davutoglu said the letter would respond to concerns raised by the so-called Vienna Group, comprised of the United States, Russia, France and the IAEA, about the technical aspects of the Tehran deal. "The important (thing) is to answer the letter of the Vienna Group in a positive spirit," he said. -- SPA