Why is the conflict between Saudi Arabia and the Houthis escalating?

Clashes between the Iran-aligned Houthi movement and the Saudi-led coalition backing Yemen's recognized government have intensified, breaking a delicate pause in fighting maintained since a 2022 United Nations-mediated ceasefire. The renewed offensive began after Houthi units advanced along the Red Sea coast toward the strategically critical Bab el-Mandab strait, prompting Saudi forces to restart their military intervention.

The fighting has rapidly spilled across the border into Saudi territory. Cross-border strikes using drones and aerial weaponry have repeatedly hit Saudi transport infrastructure, production sites, and commercial airports in recent weeks.

Attacks have struck major infrastructure nodes across Saudi Arabia. In October, strikes against the primary international airport in Riyadh killed 17 people and wounded 333, marking the deadliest incident of its kind in the kingdom in more than a decade. Another attack hit King Fahd International Airport in Dammam, causing casualties and temporarily suspending flights.

Energy facilities have also faced recurrent threats. On October 5, a drone strike on a pumping station halted flows along the seven-million-barrel-per-day East-West pipeline. Later in the month, intercepted drone debris near the Shaybah oilfield sparked a fire that killed two contractors, though field operations continued. In Dhahran, state energy producer Saudi Aramco directed all staff to evacuate its headquarters complex and transition entirely to remote work after the site was hit.

The disruption to energy infrastructure and maritime passages near the Red Sea has triggered sharp increases in energy markets. Brent crude surpassed $115 per barrel before settling near $114.57, while West Texas Intermediate climbed past $100 per barrel.

Market analysts note that traders are incorporating a heavy risk premium driven by fears of export interruptions, strained transit flows, and high shipping rates. The volatility is aggravated by supply adjustments elsewhere, including pipeline valve closures in Libya, even as Washington arranged an unexpected delivery of Russian diesel to New York to counter elevated domestic fuel prices.

In response to the deteriorating security environment, the United States instructed non-emergency personnel and their families to depart Saudi Arabia.

Meanwhile, regional allies have activated mutual defense mechanisms. Under the Makkah Defence Pact signed in August between Saudi Arabia, Turkey, and Pakistan, an attack against one signatory is treated as an assault on all three. Following recent strikes, the three nations held an emergency meeting to coordinate rapid military deployments to the kingdom. Diplomatic engagement has also accelerated, including an unannounced visit to Riyadh by French President Emmanuel Macron to express support and discuss energy supplies.

Turkey organized security talks in Istanbul bringing together the R-4 coalition—Turkiye, Saudi Arabia, Egypt, and Pakistan—with the European E-3 group composed of Britain, France, and Germany. The summit marks the first combined gathering of all seven countries under this structure.

The meeting agenda focuses on maritime safety in the Bab el-Mandab strait and the Strait of Hormuz, the crisis in Yemen, diplomatic efforts to defuse tensions between Washington and Tehran, and the broader spillover risks of conflicts in the Middle East and Eastern Europe.

Foreign ministers from the R-4 bloc and the European E-3 are meeting in Istanbul to address regional maritime security, the conflict in Yemen, and wider tensions involving Iran. Turkey's parliament is also reviewing the Makkah Defence Pact for formal ratification.