On May 22, the U.S. Department of the Treasury “designated five Iranian individuals who have provided ballistic missile-related technical expertise to Yemen’s Huthis, and who have transferred weapons not seen in Yemen prior to the current conflict, on behalf of the Islamic Revolutionary Guard Corps-Qods Force (IRGC-QF),” according to a Treasury press release. Those sanctioned include Mahmud Bagheri Kazemabad, Mohammad Agha Ja’fari, Javad Bordbar Shir Amin, Mehdi Azarpisheh, and Sayyed Mohammad Ali Haddadnezhad Tehrani.

According to Secretary of the Treasury Steve Mnuchin, “Their actions have enabled the Houthis to launch missiles at Saudi cities and oil infrastructure. They have also disrupted humanitarian aid efforts in Yemen, and threatened freedom of navigation in key regional waterways.”