One
was sent towards the port town of Jazan, close to the border with Yemen, and three were headed towards Khamis Mushait, about 234 kilometres north of Jazan, state television reported.
Another drone was intercepted on Sunday morning, coalition spokesman Brig Gen Turki Al Malki said.
"These acts of aggression to deliberately and systematically target civilians and civilian objects by the terrorist
Houthi militia amount to war crimes," he said
The US embassy in Riyadh issued a warning to Americans, calling on them to “stay alert in case of additional future attacks”.
Flight-tracking websites showed several flights scheduled to land at the international airport in Riyadh were diverted or delayed in the hour after the attack.