More than 100 American military personnel are on Saudi soil, assisting the kingdom's military with intelligence and target selection for strikes against the Houthis in Yemen. This was reported by CNN, citing five sources involved in the operations. An American official estimated the number at around 200. The Americans are operating within a joint command established in recent weeks, after U.S. intelligence indicated that Iran has increased its support to the Houthis. American officials estimate that hundreds of Revolutionary Guard members are in Yemen, operating alongside the Houthis with the aim of closing the Bab el-Mandeb Strait.