In a statement, U.S. Central Command announced that "a U.S. MQ-9 was shot down over Yemen by what we asses[s]  to be a Huthi SA-6 surface-to-air missile on June 6, 2019. The altitude of the engagement indicated an improvement over previous Huthi capability, which we asses[s] was enabled by Iranian assistance". On the 13th, CENTCOM went on to indicate, "a modified Iranian SA-7 surface-to-air missile attempted to shoot down a U.S. MQ-9 over the Gulf of Oman to disrupt surveillance of the IRGC attack on the M/T Kokuka Courageous... the SA-7 was ineffective".