"We are advising U.S. citizens to avoid traveling to the airport and to avoid airport gates at this time unless you receive individual instructions from a U.S. government representative to do so," the U.S. Embassy in Afghanistan wrote Saturday.
Defense officials have reportedly said ISIS might be attempting to focus on U.S. citizens, thousands of whom have escaped the country since the Taliban's Sunday takeover, at Hamid Karzai International Airport, according to several outlets.
"This is a specific threat that ISIS, the Islamic State, may be trying to target Americans," NBC News correspondent Courtney Kube said Saturday after speaking with defense officials.
Officials also told the outlet that the military is attempting to find a way to usher U.S. citizens safely to the airport, including methods such as "having small groups of Americans meet at locations where they can be safely brought to the airport in small groups," Kube added.
"There is a strong possibility ISIS-K is trying to carry off an attack at the airport," a U.S. defense official reportedly told CNN.
The outlet also reported that "a senior diplomat in Kabul said they are aware of a credible but not immediate threat by Islamic State against Americans at Hamid Karzai International Airport."
CNN said a defense official "described the military effort to establish alternative routes" for Americans, adequate Afghans, and third-party nationals "to get to Kabul airport and its access gates."
Defense spokesman John Kirby refused to say anything on "specific details about the threat environment" in Kabul at a Pentagon press briefing Saturday, saying only that "the situation in Kabul ... in the whole city is fluid and dynamic, and you've seen the images over the last 24 to 48 hours yourself of the situation outside the perimeter of the airport."
A White House official presented the readout, which stated , “This morning, the President met with his national security team. The Vice President joined a secure video teleconference en route to Singapore. They discussed the security situation in Afghanistan and counterterrorism operations, including ISIS-K.”
Biden cited ISIS-K during his remarks on Friday.
"We're also keeping a close watch on any potential terrorist threat at or around the airport, including from the ISIS affiliates in Afghanistan who were released from prison when the prisons were emptied. And because they are, by the way, to make everybody understand, that the ISIS in Afghanistan are the — have been the sworn enemy of the Taliban," the president said in his address to the nation.