A projectile struck Saudi Arabia's King Khalid International Airport, killing one person and wounding 11 others, according to the country's General Authority of Civil Aviation (GACA).
GACA identified the person killed in Sunday's attack as a Pakistani resident, adding that the wounded were taken to several different hospitals for treatment.
The attack targeted Terminals 3 and 4 — which handle domestic flights — and came a day after a Houthi missile struck the airport, killing 12 people and wounding more than 300, according to the Saudi-led coalition fighting the Iran-backed Houthi rebels in Yemen.
The Indian Embassy in Saudi Arabia said one of its citizens died on Sunday from injuries sustained in Saturday's attack, bringing the total death toll to 13.
Following Sunday's attack, GACA said damage assessment and airport safety inspection operations were underway.
A witness aboard a plane taxiing at the airport told Reuters that a projectile hit the runway next to some parked aircraft at around 8:30 p.m. (17:30 GMT) on Sunday, sparking a fire.
The witness said the aircraft returned to the gate, passengers disembarked and were told to leave.
Riyadh airport has been attacked four times in the past five days. Houthi attacks on King Khalid airport on Thursday killed at least three Saudi citizens, including a pilot, according to GACA.
The airport has been closed since Saturday's attack, the deadliest strike in the country since the U.S.-Israel campaign against Iran began in late February.
The Houthis claimed responsibility for the attacks prior to Sunday's strike.
The airport attacks have escalated the war in Yemen and threatened to draw U.S. forces into the conflict. U.S. President Donald Trump said he is weighing whether to join the fight against the Houthis.
The escalation adds further pressure on global oil supply and prices, as well as commercial shipping through the Bab al-Mandeb Strait off Yemen — a key alternative waterway to the Strait of Hormuz.
Trump has said he plans to speak with Saudi Crown Prince Mohammed bin Salman, who is seeking help against the Houthis, but there was no indication on Sunday that the U.S. president had followed through on that statement.
There are concerns that U.S. intervention could prompt the Houthis to block shipping through Bab al-Mandeb, further restricting the flow of oil out of the Gulf.
The rebels seized key areas along the strait last month. The Saudi-led coalition, which backs forces loyal to Yemen's internationally recognized government, is trying to retake those areas.
