Fresh attacks by Yemen’s Iran-aligned Houthis on Saudi Arabia and renewed pressure on the kingdom’s infrastructure pushed oil prices higher. Gulf Arab states also postponed planned talks with Iran, raising concerns about wider disruption to global oil supplies.

Crude oil prices rose more than 4% on Monday before settling about 1% higher. At 0026 GMT on Tuesday, Brent crude futures were up $1.24, or 1.18%, at $106.93 a barrel. US West Texas Intermediate futures rose $1.29, or 1.24%, to $102.65 a barrel.

The Houthis said on Monday that they had fired dozens of missiles and drones at the Khamis Mushait military airbase in southern Saudi Arabia. The group said it targeted aircraft hangars, radar systems, runways and ammunition depots in retaliation for Saudi air strikes in Yemen.

Saudi authorities issued emergency alerts in Khamis Mushait and three other southern cities. The Saudi-led coalition in Yemen said 13 civilians were wounded in the attacks.

Officials from Yemen’s internationally recognised government said the Houthis were strengthening their positions along the country’s western coast on the Red Sea. They said the group retained effective control over almost the entire coastline despite increased aerial bombardment by Saudi and Yemeni forces, including around the historic port of Mocha.