• Houthi militants warn workers to avoid Saudi oil facilities, threatening further strikes that could disrupt production.
  • A deadly attack on Riyadh's King Khalid International Airport has suspended operations, with airlines canceling flights.
  • Oil prices show mixed reactions as supply concerns vie with other market factors; Saudi Aramco (2222.SR)'s upcoming earnings provide a key checkpoint.

Yemen's Houthi movement has issued a stark warning to workers at Saudi oil facilities, urging them to stay away from sites that could be targeted in future attacks. The group also renewed threats against airlines, airports, and passengers in previously designated areas, according to a statement from Houthi military spokesman Yahya Saree on October 8. The warning marks an escalation in the conflict, which has already seen missile and drone strikes on Saudi infrastructure and a prolonged shutdown of Riyadh's main airport.

The immediate impact has been felt in the aviation sector. A strike on King Khalid International Airport in Riyadh on October 10 killed 13 people and wounded hundreds, leading to the suspension of operations that continued into Monday. Saudi forces reported intercepting additional missiles over Riyadh and two ballistic missiles directed toward Khamis Mushait on Monday night. Houthi official Mohammed al-Bukhaiti threatened a "swift and painful" response against U.S. interests if Washington joins Saudi military operations, according to statements cited by Reuters (TRI).

Saudi Aramco, the state-controlled energy giant, is at the center of the threats. The company produces over 11 million barrels of oil equivalent per day and reported first-half adjusted net income of SAR 251.9 billion ($67.2 billion). While the attacks have not yet resulted in a quantifiable loss of oil production, the risk to Aramco's sprawling infrastructure is significant. Energy Minister Prince Abdulaziz bin Salman said on Monday that recent events had tested the country's infrastructure and institutions but insisted that energy-system development and investment would continue.

Oil prices initially gained about 2% on Monday as the attacks heightened supply concerns, but fell on Tuesday as traders weighed the risks against prospects for additional Russian diesel supplies. Goldman Sachs (GS) estimated that an extra 800,000 metric tons of Russian diesel would reduce wholesale prices in the U.S. Gulf Coast and Europe by only $1–$2 per barrel, offering limited relief.

The conflict has also disrupted business operations beyond the energy sector. Several multinational firms in Riyadh's King Abdullah Financial District instructed employees to work from home following explosions on October 8, according to CNBC (VSNT). Airlines have curtailed services: Etihad canceled Riyadh flights until the following week and suspended services to Dammam and Jeddah; Gulf Air canceled Riyadh flights until Saturday; and Delta (DAL) delayed the planned October 23 launch of Atlanta–Riyadh flights.

International reactions have been swift. U.S. President Donald Trump said Washington was considering joining Saudi strikes, though no decision has been finalized. Iran offered to facilitate dialogue between Saudi Arabia and the Houthis, and the UAE called for renewed joint Gulf security and defense cooperation. The U.S. embassy has required authorization for government employees to use Saudi airports and urged American citizens to exercise "extreme caution."

The Houthis have stated exceptions for airports and airspace serving the holy cities of Mecca and Medina, but that is a declaration by the armed group, not an independent assurance of safety. UN human-rights chief Volker Türk condemned the repeated attacks and urged both sides to de-escalate.

Looking ahead, Saudi Aramco's third-quarter results on November 3 will provide an opportunity to assess any operational or financial effects. Security analyst Thomas Juneau of the University of Ottawa told AFP that Saudi Arabia's geographical size makes consistent defense against such attacks exceptionally difficult, pointing to persistent vulnerability.

A correction was made on October 13 to reflect that the death toll from the Riyadh airport strike was 13, not 12 as initially reported.