Houthi missile attacks on Riyadh's airport, which killed three people and destroyed a passenger plane, threaten the flagship summit of Saudi Arabia's Future Investment Initiative later this month.
The event is expected to attract thousands of international executives and investors, but flight disruptions and security concerns could discourage attendance.
Saudi leaders do not plan to cancel the summit, but are increasingly concerned about the economic impact of the attacks and the dwindling supply of anti-missile interceptors.
Source: FT