The US 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 US 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 US citizens in Turkey "to seek shelter in safe places," avoid unnecessary travel, and monitor media reports.
British Airways has also suspended travel to Turkey.
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