Saudi Arabia's civil aviation body has extended the suspension of operations at King Khalid airport in the wake of deadly attacks by Yemen's Iran-aligned Houthis, without specifying when they might resume.

At least 12 people have been killed in a suspected Houthi attack on Riyadh’s international airport.

The attacks on Saudi Arabia, a regional powerhouse and the world's top oil exporter which has poured billions of dollars into its military, were the deadliest to hit the kingdom in a decade.

Saudi-led coalition forces in Yemen said an unidentified projectile had targeted Riyadh's international airport Terminal 4 on Sunday, causing a fire. Eleven people were wounded in addition to the fatality, the Saudi civil aviation authority said.

"We call on relevant parties to avoid taking actions that escalate regional tensions," said a China foreign ministry spokesperson.

Turkey, Pakistan, Egypt and Saudi Arabia condemned Houthi attacks on Riyadh’s airport, reaffirming solidarity after a new strike killed one person.

The Houthi attacks over the weekend marked a sharp escalation in the Yemen war. Read more at straitstimes.com.

Major airports in Saudi Arabia were hit by fresh attacks on Sunday, killing one person and injuring 11 others at King Khalid International Airport in the capital Riyadh.

Iran says it is "deeply concerned" over escalating Houthi-Saudi attacks and offers to facilitate dialogue, after 14 deaths in two days of strikes on Riyadh's airport.

Saudi Arabia faces limited options after Houthi attacks on Riyadh airport and rising pressure to end the Yemen conflict. Read more at straitstimes.com.

Oct 12 - Saudi authorities said on Monday they were extending the suspension of operations at the international airport in the capital, Riyadh, after deadly weekend attacks by Yemen's Iran-aligned Houthis. Read more at straitstimes.com.

The Trump administration is considering joining Saudi Arabia's air campaign against Yemen's Iran-backed Houthi rebels.