Yemen's Houthi movement says it struck at the heart of Saudi Arabia's oil industry, but Saudi officials are pushing back. The Houthis claimed Sunday that they fired missiles and drones at Saudi Aramco facilities in Riyadh and in the Khurais oil field area, Anadolu Agency reported. They said the attacks answered about 50 Saudi-led air strikes on Yemen in 12 hours.

The Saudi-led coalition called the claim about Riyadh "misleading," according to Anadolu and Devdiscourse. As of early Monday, there was no independent confirmation of any damage to Aramco sites, and Saudi Arabia had not reported any disruption to oil output.

The claim came as Yemen's internationally recognized government, which Saudi Arabia backs, announced a military campaign to retake all territory held by the Houthis. The Houthis had just cut the main road between the besieged city of Taiz and the port of Aden. Last month, they also seized much of Yemen's Red Sea coast and declared a naval blockade on Saudi Arabia.

Here is why Khurais matters. It is one of Saudi Arabia's largest oil fields. In September 2019, drones and missiles hit Khurais and the Abqaiq processing plant, briefly knocking out about half of the kingdom's oil output. The Houthis claimed that attack, though U.S. officials blamed Iran. Since then, Saudi Arabia has added more air defenses around its oil sites.

Oil traders are watching closely. Any real hit on Saudi output would add to supply worries already driven by attacks on tankers near the Strait of Hormuz. Brent crude was near $101 a barrel on Monday.

The Houthis, backed by Iran, have controlled Yemen's capital, Sanaa, since 2014. A truce held for about four years before the war revived this year.

What we know: The Houthis claimed strikes on Aramco, and the coalition disputed the Riyadh claim.
What we don't: Whether any Saudi oil facility was actually hit or damaged.