Major Gulf markets fell on Thursday as Houthi threats against Saudi Arabia sparked investor fear. The group pledged to keep attacking oil facilities after a strike hit Aramco’s headquarters. Brent crude prices also dropped as shipping risks grew near the Strait of Hormuz, worrying experts about the region's economic future.

Oct 15 (Reuters) - Major Gulf markets buckled in early trade on Thursday as the Houthis threatened more attacks on ​Saudi Arabia, putting the country's benchmark index on ‌track for a sixth weekly loss.

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On Wednesday, Yemen's Houthis pledged to keep ​attacking airports and oil facilities in the kingdom. ⁠The threat came a day after a Houthi ​strike caused extensive damage to Aramco's headquarters in Dhahran, where ​a fire spread across several floors, three people with direct knowledge of the matter told Reuters.

Brent crude futures fell $2.28, or ​2.2%, to $103.78 a barrel by 0729 GMT.

Shipping risks ​are also growing. A container ship and a dry bulk ‌carrier sank ⁠near the Strait of Hormuz within 24 hours after projectiles hit them in separate incidents, maritime officials said on Wednesday.

On ⁠Thursday, the International Monetary Fund warned a long war in the Middle East, and further disruption to energy production, shipping ⁠routes ​or critical infrastructure posed the ​biggest risk to economies in the Middle East and Central Asia.

Reporting ​by Ateeq Shariff in Bengaluru; Editing by Kate Mayberry