The International Atomic Energy Agency (IAEA) took samples from a Tehran facility that showed traces of uranium, according to two diplomats. Last year, Israeli Prime Minister Benjamin Netanyahu flagged the site -- which Iran never declared under the terms of the Joint Comprehensive Plan of Action (JCPOA) -- as a "secret atomic warehouse" containing 15 kg of radioactive material. The IAEA inspected the site in April and took environmental samples, which can show the presence of radioactive particles even after the material has been removed. Previous reports indicated that the IAEA had found unspecified radioactive material, which the two diplomats now reveal was uranium. IAEA Acting Director-General Cornel Feruta met with Iranian officials in recent days and "stressed that these interactions (on its nuclear commitments) require full and timely cooperation by Iran."