‘All airlines prohibited by FAA from flying to US from #Turkey directly or w/stopover,’ the State Department’s Bureau of Consular Affairs said on Twitter.

The U.S. embassy in Ankara added that security ‘at Ataturk airport is significantly diminished and US government employees have been instructed not to attempt to travel to and from Ataturk airport.’

In reference to the FAA note, the embassy said that U.S. airline carriers ‘are prohibited from flying to or from Istanbul and Ankara airports.

‘All airline carriers, regardless of country of registry, are prohibited from flying into the United States from Turkey either directly or via third country,’ the embassy said.

It advised U.S. citizens in Turkey ‘to seek shelter in safe places,’ avoid unnecessary travel and monitor media reports.

The warnings remain in place even though Turkish airports reopened following President Recep Tayyip Erdogan’s pre-dawn announcement of victory over discontented army officers who mounted a bloody attempt to overthrow him.

Forces loyal to Turkey’s president quashed the coup attempt in a night of explosions, air battles and gunfire that left at least 161 people dead and 1,440 wounded Saturday.

Authorities arrested thousands as Erdogan vowed that those responsible ‘will pay a heavy price for their treason.’

The chaos came amid a period of political turmoil in Turkey – a NATO member and key Western ally in the fight against the Islamic State group – that critics blame on Erdogan’s increasingly authoritarian rule.

Staying in power by switching from being prime minister to president, Erdogan has shaken up the government, cracked down on dissidents, restricted the news media and renewed fighting with Kurdish rebels.

The government has also come under pressure from the millions of refugees in Turkey who have fled violence in neighboring Syria and Iraq, and a series of bloody attacks in Turkey blamed on the Islamic State group and Kurdish rebels.

Meanwhile on Saturday, operations from the U.S. military Incirlik air base were suspended because of the closure of the airspace used by the missions, Pentagon spokesman Peter Cook said in a statement.

U.S. forces ‘were adjusting flight operations in the counter-ISIL campaign to minimize any effects on the campaign,’ he said, apparently suggesting missions against IS — also known as ISIL — could launch from other locations.

The Turkish authorities imposed a security lockdown at Incirlik on Saturday following an attempted coup d’etat by military officers overnight.

U.S. forces use Incirlik to launch bombing missions against Islamic State targets in Syria and Iraq. They have notably deployed drones, Prowler electronic warplanes and A-10 ground attack aircraft from the base.

An American official had said late Friday that anti-IS missions from Incirlik had not been affected by the coup attempt. But the closing of airspace changed that, Cook said Saturday.

While electricity to Incirlik had been cut off, generators had been able to maintain operations, and that flights could be launched once airspace reopened, he said.

‘U.S. officials are working with the Turks to resume air operations there as soon as possible,’ Cook said.

British Airways went further and cancelled all its Saturday flights to and from Turkey ‘in light of the events unfolding’ there, a company spokeswoman said.

Lufthansa cancelled eight of the 10 flights scheduled between Germany and Turkey, including all flights to Ankara and Istanbul.

The two remaining flights will go to the resorts of Bodrum and Antalya, a Lufthansa spokesman told AFP.

The German airline would decide later in the day whether to run flights on Sunday, he added.

Meanwhile, Putin asked officials to provide everything necessary for tourists awaiting flights to Turkey in Russian airports ‘until the situation becomes clear.’

Russia’s national carrier Aeroflot has cancelled its flights to Istanbul and Antalya on Saturday and Sunday.

Other smaller airlines were continuing their flights to southern Turkish resorts, with Easyjet and Thomas Cook saying they did not expect any changes to its schedules to places such as Antalya, Izmir and Rhodes.