One person was killed and 11 others injured in a second projectile strike on King Khalid International Airport in Saudi Arabia's capital, Riyadh, on Sunday. Officials stated that the projectile hit a passenger hall, igniting a fire.

This incident follows a significantly deadlier attack on the same airport just a day prior, which resulted in 13 fatalities and 308 injuries. The Houthi group, based in Yemen, has claimed responsibility for these escalating attacks and has warned airlines and passengers to avoid Saudi airports and airspace.

The Saudi civil aviation authority confirmed the death of a Pakistani resident in Sunday's attack. The Houthis stated they targeted the airport with a combination of ballistic missiles, cruise missiles, and drones within the preceding 24 hours. They also claimed responsibility for attacks on oil facilities and Dammam airport in eastern Saudi Arabia.

Brig Gen Yahya Saree, the Houthi military spokesman, vowed to continue "escalating operations deep inside Saudi Arabia," declaring all Saudi airports potential targets except for those in the holy cities of Mecca and Medina. The Houthis cite Saudi Arabia's support for government forces in Yemen's civil war and an air strike on Sanaa airport as reasons for their actions.

Maj Gen Turki al-Maliki, a spokesman for the Saudi-led military coalition, reported that air defenses intercepted a missile near the Riyadh airport on Sunday. Authorities were managing a fire caused by an "unknown projectile" that struck Passenger Hall No. 4. The Saudi-led coalition has labeled Saturday's attack a "war crime" and pledged a response.

Saturday's casualties included four Saudi nationals, two individuals from Bangladesh, and one each from the United States, Jordan, Palestine, Syria, Sudan, and Egypt, according to the Saudi civil aviation authority. The Indian embassy in Saudi Arabia also reported that an Indian national died from injuries sustained in that attack.

U.S. Secretary of State Marco Rubio condemned the attacks and confirmed the death of a U.S. citizen. British Foreign Secretary Ed Miliband expressed his "appalment." The UK Foreign Office has advised against travel to certain areas of Saudi Arabia near the Yemeni border, with other Western embassies issuing similar travel warnings for their nationals.

In retaliation, Houthi-run Al Masirah TV reported that Saudi forces conducted an airstrike on Sanaa International Airport in Yemen's capital, which also struck a residential home, killing a child and injuring six people.