Iran's IRGC has provided the Houthis in Yemen with training, intelligence, and advanced weaponry, including drones and missiles. This support includes targeting data and tactical guidance used to conduct sophisticated attacks against Saudi Arabia and its Yemeni allies.
These operations have resulted in the Houthis seizing the coastline of the Bab al-Mandeb Strait and launching strikes on Saudi energy facilities, airports, and the presidential palace. One recent strike in Riyadh resulted in at least 13 deaths.