Yemen's Houthis have claimed a ground attack on Saudi Arabia's largest refinery.

Yemen's Houthis have claimed a ground attack on Saudi Arabia's largest refinery.

Yemen's Iran-backed Houthis announced a ground attack on Ras Tanura, Saudi Arabia's largest refinery, on Thursday. This group also claimed a ground attack on the Rabagh refinery, an Aramco-owned facility, and King Khalid Airports in Riyadh and King Fahd Airports in Dammam.

Saudi Arabia has yet to confirm these claims, however, that country said on Thursday morning that it had intercepted two ballistic missiles fired from Yemen over Riyadh.

Shortly before this announcement, the AFP reported that explosions were heard in the Saudi capital.