Saudi Arabia said on Tuesday that it intercepted ballistic missiles and bomb-laden drones launched by Yemen's Houthi rebels in an attack that began the previous night.
The kingdom has fought a yearslong war against the Iranian-backed Houthis, who seized Yemen's capital in September 2014.
The rebels did not immediately acknowledge the attack, though their Al-Masirah satellite news channel said their forces would make an announcement later in the day about "a broad operation in Saudi Arabia."