Houthi missile strike on Riyadh airport kills at least 13 as rebels bring war to heart of Saudi Arabia

Houthi forces struck King Khalid International Airport in Riyadh last Saturday, killing at least 13 people and injuring hundreds in the deadliest attack on Saudi Arabia since the US and Israel's war on Iran began in February. The strike — the third Houthi hit on a Saudi facility in a week — has rattled the kingdom at a moment when Crown Prince Mohammed bin Salman is driving a sweeping economic diversification away from oil. Pilgrims have been caught up in the attacks, and analysts warn the Houthis are targeting the economic ambitions that underpin Saudi Arabia's global standing.

The $6m Six Kings Slam tennis tournament, featuring Carlos Alcaraz and Novak Djokovic, has been postponed from next week to December 27 over the airport strikes.

Experts say Houthis are seeking to inflict economic damage on Saudi Arabia, exploiting limits in its vast air-defence arsenal.