The Federal Aviation Administration (FAA) has alerted U.S. airlines to exercise caution when operating in or around Saudi Arabia following deadly attacks attributed to Yemen's Iran-backed Houthis, which have led to the closure of the airport in the Saudi capital.

As of Monday, King Khalid International Airport in Riyadh remains shut down due to strikes that began last week. The situation escalated on Saturday when a projectile hit a passenger terminal at the airport, resulting in at least 12 fatalities and over 300 injuries.

In response to the attacks, airlines have suspended flights to the airport, with some halting services for the remainder of the week.

The U.S., Australia, and several other nations have advised their citizens against traveling to the region amid these safety concerns.

On Sunday, the FAA issued a statement urging pilots to 'exercise caution' in or around Saudi Arabia due to 'safety-of-flight risks associated with ongoing military activities' and potential navigation system issues. The FAA noted that these threats could pose risks to aircraft at all altitudes and that the warning will remain in effect until December 10.

While most U.S. airlines do not operate flights to Saudi Arabia, the number of flights and passenger traffic in the country has increased in recent years. The route connecting Riyadh to Jeddah was the fifth-busiest globally last year, according to aviation-data firm OAG.

Delta Air Lines had planned to begin its first nonstop service from Atlanta to Riyadh on October 23, but announced on Monday that it would postpone this launch until March.