An attack hit King Khalid International Airport in Riyadh, Saudi Arabia, on Saturday. It killed 12 people and injured 309. Some injured people are very sick. The people who died came from Saudi Arabia, Bangladesh, the United States, Jordan, Palestine, Syria, Sudan and Egypt.

Saudi Arabia stopped all flights at the airport. Airlines cancelled or changed their flights. Saudi Arabia blamed the Houthis, a group from Yemen. The Houthis did not speak about this attack. But they said they carried out other attacks on the same airport on Thursday.

Saudi Arabia said it may attack the Houthis in answer. The United States may also help Saudi Arabia. The Houthis and the Saudi-backed government are fighting for control of Yemen. This war started many years ago, and the fighting has become worse again in recent months.