There was no immediate comment from the government but according to Saudi news channel al-Arabiya, the explosions were caused by the Saudi air defence intercepting a rocket.
The announcement came after three blasts and clouds of smoke were seen in the sky in Riyadh.
Saudi Arabia blames Iran for supplying projectiles for rebel missile attacks, a charge Teheran rejects.
Bills' 2018 preseason schedule includes nationally televised game, familiar faces
Los Angeles will make a cross-country trip for the first week of the preseason, taking on a Ravens team that finished 9-7 in 2017. The Bengals' first game of any kind at Paul Brown Stadium was a 24-20 win over the Bears in preseason on August 19, 2000.
Saudi air defenses intercepted on Wednesday three ballistic missiles fired by the Iran-backed Houthi militias in Yemen.
Meanwhile, the Yemeni Defense Ministry reported that 30 Houthi fighters were killed in the air bombardment by Saudi-led warplanes in central al-Bayda Province.
However, sources in Abha'a airport said the airport has stopped flights for security reasons following the drone attacks on Saudi Aramco.
Genetic Risk of Heart Disease is Reduced by Increased Physical Activity
Heart Disease has a large sub category of ailments including: Heart Attacks, Stroke, Heart Failure and Atrial Fibrillation. Each person in the study was categorized by their risk factors as either: high risk, moderate risk or low risk.
Saudi-owned broadcaster Al Arabiya TV confirmed Saudi Arabia had been forced to intercept a ballistic missile launched by Yemen's Houthis towards the southern city of Jizan. "This hearing will allow members to examine USA policy toward the Middle East as we grapple with these conflicts and approach a key deadline for the Iran nuclear agreement", he said.
The Houthi movement said earlier it had launched a drone strike on a facility belonging to state oil firm Saudi Aramco, though the company said its facilities there were operating "normally and safely".
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Hamilton hit by grid penalty in Bahrain
Williams driver Sergey Sirotkin has hit out at his team following a poor weekend at the Bahrain Grand Prix. Lewis Hamilton faced a tough job starting P9 due to a gearbox change and a fairly uninspiring Saturday.