Yemen’s Houthi movement vowed on Wednesday to continue attacks on airports and oil facilities in Saudi Arabia, a day after a strike reportedly damaged the headquarters complex of oil giant Saudi Aramco.

The Iran-aligned group said it had launched ballistic missiles, cruise missiles and drones targeting Saudi Aramco facilities in Dhahran, King Khalid International Airport in Riyadh and an Aramco refinery in the Saudi capital. The Houthis did not specify when each attack took place.

A source told Reuters that a ballistic missile struck an office tower within the Aramco headquarters complex in Dhahran, damaging its top three floors. Saudi authorities said the attack caused a limited fire, but no injuries or deaths were reported.

The Houthis described the targeted sites as legitimate military targets and said their attacks were retaliation for Saudi strikes against Houthi-controlled areas in Yemen.

Saudi Arabia has faced an intensifying wave of Houthi attacks in recent days. An attack on King Khalid International Airport in Riyadh on Saturday killed 13 people, according to Reuters. The airport was subsequently closed until October 17, disrupting air travel and prompting airlines to cancel flights to Saudi Arabia.

On Wednesday, the Saudi-led coalition said it had intercepted a missile launched toward Riyadh, as the conflict continued to threaten critical infrastructure and civilian safety.

Saudi Arabia intervened in Yemen’s civil war in 2015 in support of the internationally recognised government after the Houthis seized the capital, Sanaa. A United Nations-brokered truce in 2022 brought a period of relative calm, but fighting has intensified again amid wider regional tensions involving the United States and Iran.

The latest threats raise concerns about the security of Saudi Arabia’s oil infrastructure, airports and commercial transport networks. Further attacks could also disrupt regional energy supplies and air travel as the conflict escalates.