Saudi Arabia says its archrival Iran may have committed an "act of war" when Iranian-backed Houthi rebels in Yemen fired a missile at Riyadh.
The Saudis intercepted the missile fired at King Khalid International Airport Saturday.
The Saudi-led coalition battling the Houthis says it has the "right to respond to blatant military aggression" by Iran.
"Iranian interventions in the region are detrimental to the security of neighboring countries and affect international peace and security," Saudi Foreign Minister Adel al-Jubeir said on Twitter.
Iran denies arming the Houthis and its foreign minister Mohammad Javad Zarif blasted the Saudis for causing death and destruction in Yemen.
"KSA (Kingdom of Saudi Arabia) bombs Yemen to smithereens, killing thousands of innocents, including babies, spreads cholera and famine, but, of course, blames Iran," he tweeted.
The coalition said Monday it is temporarily shutting down Yemeni land, sea, and airports in response to the missile attack.