RIYADH — The Saudi civil defence agency said a kindergarten and a medical complex in Riyadh were damaged by debris from a missile interception yesterday, as Yemen’s Houthis announced attacks targeting the capital’s airport.

Two witnesses said that a plane at the airport belonging to national flag carrier Saudia had cracks and holes in its fuselage. A source briefed on the matter said three planes suffered damage.

Saudi Arabia leads a pro-government coalition fighting the Houthis in Yemen’s civil war. The Iran-backed group has repeatedly targeted Riyadh since the conflict roared back to life in July, vowing to hit critical infrastructure and disrupt Saudi airspace.

The scale and frequency of the attacks on the Saudi capital have been unprecedented in the eight months of wider war in the Middle East.

The Houthis announced three attacks yesterday against Riyadh airport. Houthi military spokesman Yahya Saree said the group also launched missiles at an airport in Najran and an airbase in Khamis Mushait.

Recent attacks have also targeted oil infrastructure in the world’s largest crude exporter.

The Houthis yesterday warned workers to evacuate Saudi Arabia’s oil facilities, having days before hit a major refinery south of the capital.

Earlier in the day, the Saudi-led coalition fighting the Houthis said it had intercepted two missiles fired towards Riyadh.

The kingdom’s civil defence agency said “interception debris” had damaged a kindergarten and a medical complex in the city. It did not say if there were casualties or provide details of the damage.

Admissions by Saudi authorities of civilian targets being hit are relatively rare. There have been few statements on Houthi attacks in recent weeks.