Saudi air defenses intercepted four Houthi militia drones and a ballistic missile targeting Saudi Arabia’s southern region on Saturday, according to Al Arabiya sources in the Arab coalition.

The coalition sources said that measures are being taken to protect civilians against hostility from the Iran-backed Houthi militia forces in Yemen.

An Arab-led coalition intervened in Yemen’s civil war in March 2015. Drone attacks by Houthi forces on Saudi targets have become common in recent years.