Recently expired U.S. passports cannot be used to travel from the United States to an international destination or to travel to a foreign country for any length of stay longer than an airport connection en route to the United States or to a United States territory.

While you may only travel directly back to the U.S. on your expired passport, you may seek emergency consular services in a different country as needed. more"

The latest move comes after the US Embassy in Russia called on Americans to leave “immediately” due to airlines canceling flights into and out of Russia and several countries banning Russian airlines from using their airspace.

“US citizens should consider departing Russia immediately via commercial options still available,” the Embassy warned in a statement.

The United States already closed its embassy in Kyiv as Russia prepared the invasion and has been calling for weeks for American citizens in Ukraine to get out.

A small team of US diplomats is handling embassy affairs from the western city Lviv, near the border with Poland.

The US embassies in the Belarus capital Minsk and Moscow were already operating at a reduced level because of tit-for-tat diplomat expulsions going back several years.

QNA said representatives from both countries "laid the foundation stone for expanding" Al-Udeid.

"It is premature to discuss aspects of a potential base expansion at an Al-Udeid airbase in Qatar," Lieutenant Commander Rebecca Rebarich said in a statement.

"The US military is working with the Qatari ministry of defence on further details of the proposal to help us to plan appropriately and ensure we will use any new facilities effectively," she said.

According to QNA, the project includes "the construction of barracks and service buildings to support joint security efforts, as well as improving the quality of life of the troops stationed at the airbase".

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Around 10,000 US troops are deployed in al-Udeid, the largest US base in the Gulf where Washington stocks munitions and equipment and deploys warplanes used in the battle against the Islamic State group.

Other members of the US-led coalition fighting IS in Syria and Iraq are also deployed at al-Udeid, located 20 miles southwest of Doha.

QNA said the expansion project "underscores Qatar's commitment to deepening its strategic military relations with the United States".

"The State of Qatar, along with its strategic US ally, is working on drawing up a roadmap for the future of bilateral relations, including the addition of al-Udeid Air Base to the list of US permanent military bases," it said.

Ryan Gliha, the US charge d'affaires in Doha, echoed this in remarks at a news conference after the ceremony to lay the foundation stone for the expansion of the base.

"We saw today the opening of a new construction project... what we hope to see in the coming years and months is (the) strengthening" of bilateral ties, he said.

"Billions of dollars have been spent already at al-Udeid over the last 15 years to support our operations... These are essential to the fight against Daesh and our ability to lead the coalition," he said, using an Arabic acronym for IS.

Gliha described Qatar as an "indispensable partner for the United States”.

He also said the United States is looking to "build some momentum" towards resolving the Gulf crisis ahead of a possible summit in the autumn, more than a year after a controversial blockade on Qatar.