The US State Department has ordered some diplomats and family members to leave their missions in Saudi Arabia and is planning to transfer family members from other US missions in the Gulf, US officials told Reuters. State Department spokesman Tommy Pigott said in a post on Washington had returned some diplomatic staff to the region in recent months after many were withdrawn when Tehran launched retaliatory attacks on US facilities after the US-Israel war against Iran began in late February. “They have increasingly engaged in hostilities against Saudi Arabia, including attacks on civilian airports and other critical infrastructure resulting in civilian casualties and severe travel disruptions,” Pigott said. Four US officials told Reuters that US missions in other Gulf states would also order their relatives to leave. Pigott did not address changes to other missions outside of Saudi Arabia. Get daily national news Get daily Canadian news delivered to your inbox so you never miss the day’s top stories. A series of previous alerts for Saudi Arabia issued in recent days used nearly identical language and noted that U.S. government personnel need special permission to use any Saudi airport. The Houthis have routinely attacked Riyadh’s King Khalid International Airport, which had been closed since October 10 following a serious attack. But earlier on Wednesday, planes from a limited number of Saudi airlines took off and landed at the airport, two days after Saudi aviation authorities notified the airlines that they could resume operations with prior permission. Still, major airlines such as Lufthansa and Air France have canceled flights to Riyadh until mid-November. Saudi airlines, including Saudia and FlyNas, were among those operating flights on Wednesday. More around the world More videos The Houthis have acknowledged attacking the airport, claiming without evidence that Saudi Arabia provided military equipment to government forces through the facility. Saudi Arabia’s Energy Ministry told the Associated Press on Wednesday that debris from an intercepted drone killed two people and injured two others at an oil field operated by Aramco in the country’s southeast. The ministry said the two dead people were Nepalese and Filipino citizens, while the injured were Pakistani and Indian citizens. Falling debris also caused a fire in a contractor’s vehicle at the Shaybah oil field, the ministry said in a statement. The US Embassy in Riyadh issued a security alert on Wednesday about possible new Houthi attacks on Saudi Arabia, following recent deadly attacks, including at Riyadh airport.