SANAA, July 29 (Xinhua) -- Yemen's Houthi rebels said they launched a drone attack at King Khaled Air Base in the southwestern Saudi city of Khamis Mushait on Monday night, Houthi-run al-Masirah TV said on Twitter.

The attack targeted military facilities in the air base, it added.

There was no Saudi confirmation on the attack.

Houthis have recently stepped up drone attacks on Saudi Arabia, but most of the drones were intercepted by the kingdom's air forces.

Saudi Arabia has been leading an Arab military coalition against Iran-allied Houthis in Yemen for more than four years in support of the exiled internationally-recognized government of Yemeni President Abd-Rabbu Mansour Hadi.