Energy Minister Prince Abdulaziz bin Salman said Monday the kingdom had been tested in its infrastructure, institutions and resilience, warning that "energy security can't be taken for granted" as oil topped $105 a barrel. The escalation centers on King Khalid International Airport in Riyadh, where operations remained suspended Monday:

Saturday: Houthi strike killed 13 and wounded hundreds - the deadliest attack on Saudi soil in over a decade. CCTV showed pilgrims in a departure lounge before a flash tore through the building.

Wednesday-Thursday: 4 killed in earlier attacks.

Sunday: 1 killed, plus another projectile sparked a fire and a missile intercepted nearby. Residents reported blasts shaking houses.

Monday: 1 killed and 11 wounded in a strike on Dammam airport. The coalition also said it intercepted a Houthi ballistic missile headed for Khamis Mushait, home to a major base.

Riyadh remained tense Monday, with the coalition responding to drone and missile threats and Australia's embassy urging citizens to shelter in place. The Iran-backed Houthis on Sunday claimed multiple attacks in 24 hours, including on the airport, and threatened to keep targeting Saudi transit hubs as "a theatre of operations". The attacks rock the world's top oil exporter as it pursues expensive reforms to attract foreign investment. Riyadh is currently hosting a packed events calendar, including the flagship Future Investment Initiative. Despite vast military spending, analysts say the kingdom's size makes consistent defense impossible. "Saudi air defenses have been able to intercept some attacks, but Saudi Arabia is so large", said Ottawa University's Thomas Juneau, adding the Houthis "want to do to Saudi Arabia what Saudi Arabia does to them" after a decade of Saudi-led coalition control over Yemeni airspace since 2015. The coalition called Saturday's strike a "full-fledged war crime" and vowed to respond decisively. The UN condemned it, U.S. President Donald Trump said he was considering joining Saudi strikes, and Iran said it was "deeply concerned". (Bssnews)