A strike on King Khalid International Airport in Riyadh has killed at least 12 people and injured 309, Saudi Arabia's General Authority of Civil Aviation (GACA) said early on Sunday.
Saturday's attack was the third on the airport over the past week and the deadliest single attack in any Gulf Co-operation Council (GCC) country since the US-Iran war began in late February.
A source with knowledge of the situation said the attack targeted passenger terminal 3, which is used for domestic flights. Operations at the airport were temporarily suspended, GACA said.
The dead included four Saudi citizens, two Bangladeshis and one national each from the US, Egypt, Jordan, Syria, Palestine and Sudan, GACA said. Some of the 309 injured were in a "critical condition", it said.
The attack came a day after Yemen's Houthi rebels declared an air blockade of Riyadh airport, saying only humanitarian flights that had secured approval from the Houthi authorities would be permitted to land or depart.
Houthi military spokesman Yahya Saree reiterated that guidance on social media platform X around the time of Saturday's attack.
In a subsequent statement on Sunday, Saree renewed warnings against using Saudi airports and airspace, saying they remained exposed to attack by Houthi forces. He said the warning did not apply to airports serving Mecca and Medina, and that the group would continue its policy of "airport for airport, siege for siege, and escalation for escalation" until it achieved its objectives.
The Houthis have carried out a series of attacks on Saudi energy infrastructure and airports in recent weeks as fighting intensifies between the group and forces aligned with Yemen's Saudi-backed internationally recognised government.
The latest attack brings the death toll from missile and drone strikes on Saudi airports to at least 18 this week. Two attacks on Riyadh airport on 9 October killed three people, including a pilot who worked for national carrier Saudia, while attacks on Riyadh and Abha international airports on 6-7 October killed another three.
The Saudi-led coalition, which has backed the Yemeni government in its fight against the Houthis for more than a decade, separately said a projectile had fallen near King Fahd International Airport in Dammam, on Saudi Arabia's east coast.
Shortly after the Riyadh airport attack, US president Donald Trump was asked whether Washington would consider joining Saudi military action against the Houthis.
Trump said the US "may" join and that his administration would "make a decision" soon. "We move very quickly," he said.
