No immediate reaction from Saudi Arabia, which has faced repeated missile and drone attacks from Houthi rebels.
A loud explosion rocked Riyadh on Tuesday three days after the kingdom intercepted a projectile fired at the Saudi capital.
No immediate reaction came from Saudi Arabia, which has suffered repeated missile or drone attacks by Houthi rebels in neighboring Yemen since 2015.
The explosion shook windows in the Saudi capital at around 1 p.m. (10 a.m. GMT), witnesses said. Some residents said they heard two explosions on social media.
Saudi Arabia-owned Al Arabiya TV cited local reports of an explosion and videos circulating on social media of a missile intercepted over Riyadh.
On Saturday, the Saudi-led coalition, which backs Yemen’s internationally recognized government against the Houthis, said it had intercepted and destroyed a “hostile aerial target” heading towards Riyadh, state television reported.
The brief statement did not identify the source of the target and the Houthis said they were not involved.
Riyadh’s King Khaled International Airport said there were a number of flight delays following the incident on Saturday.
Saudi Arabia has led a military intervention against the Houthis since 2015 and has repeatedly been the target of cross-border attacks.
However, it is rare for drones or missiles launched by the Houthis to reach the kingdom’s capital, about 700 km (435 miles) from the border.
The incident comes just days after Joe Biden was sworn in as US president, replacing Donald Trump.
On Monday, the Biden administration froze sanctions on relations with the Houthis for a month as it examines a “terrorism blacklist” imposed under Trump, which aid groups say exacerbates the already devastating humanitarian crisis .
Relief groups say they have no choice but to deal with the rebels who control much of Yemen, including the capital, Sana’a.