The United Nations confirmed the Iranian origin of cruise missiles launched at airports and oil refineries in Saudi Arabia in 2019 as well as of weapons seized by the United States in November 2019 and February 2020. Cruise missile debris from the attacks on Saudi Arabia "were identical or similar" to some of the items in the U.S. seizures, according to a U.N. report on the implementation of a 2015 Security Council resolution that enshrines the Joint Comprehensive Plan of Action (JCPOA). The United Nations noted that the acquisition and transfer of these weapons may have been "inconsistent" with the 2015 resolution. Iran denied any involvement in the attacks, for which the Houthis in Yemen claimed responsibility.