Secretary of State Antony Blinken said there are about 1,500 people who may be Americans left in the country and added that when evacuation operations began, there was a population of as many as 6,000 American citizens in Afghanistan who wanted to leave.
Blinken said the US has “evacuated at least 4,500 American citizens and likely more” since Aug. 14, and more than 500 were evacuated in the last day alone.
“Over the past 24 hours we’ve been in direct contact with approximately 500 additional Americans and provided specific instructions on how to get to the airport safely,” he said.
Blinken noted that some may have left the country, some may not actually be Americans and some may choose to stay. Blinken said Americans are not required to register with the State Department, making precise counts difficult.
The State Department believes "the number of Americans actively seeking to leave Afghanistan is lower, likely significantly lower," but noted that they are "dynamic" calculations, Blinken added.
In a briefing to congressional staff earlier today, a Senate aide told CNN the State Department said that at least 4,100 American citizens are still actively seeking to get out of Afghanistan. The source said not all the Americans are located in and around Kabul.
President Biden said Tuesday he had asked Blinken to give the public “an update and a detailed report on exactly how many Americans are still in Afghanistan, how many we got out and what our projection is.”
Earlier today, the Pentagon announced that a total of 19,000 evacuees left Afghanistan in the last 24 hours, with 42 US military aircraft carrying 11,200 people and another 7,800 people evacuated by coalition partners.
The Pentagon said there are more than 10,000 people waiting at the airport to leave but that the number would change as more people arrive at the airport and as flights depart.
Update: This post has been updated to reflect the estimated number of American citizens who may be in Afghanistan as stated by Secretary of State Antony Blinken.
CNN's Jennifer Hansler contributed reporting to this post.