Yemeni Houthi rebels on Tuesday claimed responsibility for attacking a Saudi weapons depot at Najran airport near the border with Yemen using an explosive-laden drone.
The Saudi-led coalition fighting the Houthis in Yemen since 2015 said it was a civilian facility, adding that no casualties were reported.
It also accused the Houthis a few hours earlier of firing two ballistic missiles at Mecca, the holy place of Islam, which Iran-backed rebels denied.
The shooting of drones and Houthi missiles in Saudi territory had almost stopped since the end of last year during negotiations between belligerents organized by the United Nations but resumed in a context of strong tension between Tehran, the United States and their allies of the Gulf.
On Sunday, the rebels announced plans to attack 300 military targets vital to Saudi Arabia, the United Arab Emirates and Yemen.
Two Saudi pumping stations were targeted last Tuesday by drones trapped.