The coalition's statement came after Yemen's Iran-backed Houthi group claimed it had struck "sensitive sites" in the Saudi capital with a "large number of ballistic and cruise missiles and drones." Houthi military spokesman Yahya al-Sarea said the attack also targeted Aramco facilities in the Red Sea port of Yanbu, a key oil export hub, and was in response to Saudi strikes on the Yemeni capital Sanaa.
Reuters video and photographs showed flames and a column of black smoke rising from what appeared to be fuel tanks near King Khalid International Airport. Footage captured firefighters battling a burning tank emblazoned with the Aramco logo.
Saudi civil defence sent phone alerts overnight warning of potential aerial attacks in Riyadh and the city of Al-Kharj, before issuing an all-clear on Saturday morning. Explosions were heard in the capital. Authorities also issued warnings for Jeddah and Yanbu.
There was no immediate official comment from the Saudi government on the Houthi claims or the smoke reported near the airport, which FlightRadar24 said caused delays and cancellations.
The attack marks the first time air raid alerts have been sounded in Riyadh since the Houthis escalated their campaign against Saudi Arabia in July, when they declared a naval blockade on the kingdom. The Houthis, who control most of Yemen's populated areas and seized the entire Red Sea coast this month, say the Saudi air force has conducted hundreds of strikes against them in recent days.
Saturday's fighting also claimed 48 lives, according to an unconfirmed report from AFP news agency citing military sources on both sides of Yemen's civil war: 31 Houthi fighters and 17 government soldiers were killed. The International Organization for Migration reported that the number of people displaced by recent fighting has passed 104,796.