A missile fragment last month killed an Egyptian resident of Riyadh - the first death reported in the capital as a result of the missile strikes.
Saudi Arabia's missile interceptions came hours after Saudi air defences shot down two unmanned Yemeni drones in southern Saudi Arabia..
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Three loud blasts were heard and three clouds of smoke could be seen in the sky above central Riyadh, according to witnesses.
Saudi Arabia and a coalition of Muslim states intervened in Yemen's civil war in 2015 to try and push back the Houthis after they drove the internationally recognized government into exile in Riyadh.
Evidence documented by the Conflict Armament Research group, or vehicle, said the Qasef-1 drone appears to be Iranian-manufactured and has been supplied in batches to Houthi forces in Yemen.
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Colonel Turki al-Maliki, the spokesman for the Arab Coalition Forces fighting in Yemen, said that at 7:40 am local time air defense systems detected an object and dealt with it accordingly. Saudi Arabia and the coalition it leads in Yemen accuse the Houthi movement of being sponsored and backed by Iran, while Tehran and the rebels deny those charges.
"The air force announced the execution of air strikes with the Qasef-1 aircraft on Aramco in Jizan (province)", the channel said on its Twitter account, referring to a drone the Houthis unveiled a year ago.
He said Saudi forces also intercepted two missiles in the southern Jizan and Najran provinces close to the border with Yemen.
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A week ago, Saudi air defence forces said they shot down a missile fired by the Houthis at the Aramco refinery in Jizan.