The Saudi-led military coalition announced that a Houthi attack on King Khalid International Airport in Riyadh, the Saudi capital, on Saturday resulted in at least 12 deaths and 309 injuries. Saudi Arabia vowed "firm" retaliation, and US President Donald Trump condemned the attack, stating that the US is evaluating whether to join military action against the Houthis. On Sunday, the Houthis again warned airlines, airport staff, and travelers to avoid Saudi airports and airspace, declaring them a military operational zone and stating that Saudi Arabia would bear responsibility for failed interceptions. Following the attack, airport operations were suspended, flights were canceled or diverted, and schools in Riyadh were instructed to conduct a week of remote learning.