Saudi Arabia’s energy minister vowed a “serious” response to Houthi attacks on the kingdom’s airports and oil and gas facilities, according to BBC News.

On Sunday, a Pakistani man was killed in an attack on a terminal at the capital’s King Khalid International Airport, a day after a Houthi missile hit another terminal, killing 13 people and forcing its closure, Saudi authorities said. With attacks on Saudi Arabia and on oil tankers near the Strait of Hormuz back at the center of supply concerns, oil climbed to its highest levels in nearly two weeks on Monday morning, according to OilPrice.com.