The Houthis also claimed they targeted King Khalid Air Base in Khamis Mushait with drones and missiles. (EPA Images pic)

RIYADH: Saudi authorities said on Wednesday that three people were killed in attacks on two of the kingdom's international airports including in the capital Riyadh, after Yemen's Houthis claimed to have fired on both transport hubs.

The Iran-backed fighters earlier took responsibility for a flurry of attacks that included firing a ballistic missile at Riyadh's King Khalid International Airport as the conflict deepens with Saudi Arabia, which backs Yemen's government.

"On Tuesday and Wednesday... Abha International Airport and King Khalid International Airport were subjected to attacks targeting their facilities," the kingdom's civil aviation authority said in a statement, without blaming anyone for the attacks.