France, Oct. 11 -- UN Secretary General Antonio Guterres said he was "deeply shocked" by Saturday's attack on Riyadh's airport, which killed 12 people and wounded over 300, according to aviation authorities.

"Attacks on civilians and civilian infrastructure are a violation of international law. These attacks must cease immediately," Guterres said in a statement.

EU chief Ursula von der Leyen called the attack a "dangerous escalation" and said the Iran-backed group must halt strikes on civilian targets.

"These attacks by Iran's proxies are pushing the region into a spiral of violence. They are destabilizing crucial global transport and energy nodes with shockwave sent through the world," von der Leyen said.

"These murderous attacks at ...