12 people are killed and 309 injured in an attack on Riyadh airport

12 people have been killed and 309 injured in an attack on King Khalid International Airport in Riyadh, Saudi Arabia, attributed by the Saudi authorities to the Houthi in Yemen. 

According to the country's Central Aviation Authority, the fatalities include citizens of seven nationalities: four Saudis, two U00A0bangladeshi, one American, one Egyptian, one Jordanian, one Palestinian and one Sudanese.

Flights have been cancelled, and  will not resume until "damage counts and safety guarantees". 

Saturday is the second Houthi attack in recent days, killing three people on Friday by firing missiles at Riyadh airport.

Saudi Arabia has promised a "strong response" and is beginning to intensify the bombing of the capital, Sana'a, and south-west Yemen, where the Houthis are supposed to be.

Rebels threaten more attacks

Yemen's Houthi rebel military spokesman, Yahya Sari, has warned that airlines and personnel operating in Saudi Arabia are at risk because they "may be targeted" by the militia.

International condemnation

Coalitionforces led by Saudi Arabia have denounced the attack as a "war crime" and promised a "strong response."

The Arab League(composed of 22 countries) has also strongly condemned the incident, including Jordan, Qatar, Kuwait and Bahrain.

UNSecretary General Antonio Guterres has acknowledged that he is "deeply shocked" and recalled that "attacks on civilians and civilian infrastructure are a violation of international law." Guterres has called for "an immediate cessation of the onslaught." The UN Special Envoy for Yemen, Hans Grundberg, has also joined in the message of condemnation.

Finally, the European Union's High Representative for Foreign Policy, Kaja Kallas, has strongly condemned the "heinous act of terrorism" and expressed solidarity with Saudi Arabia.