The US has warned of another terror attack at Kabul airport and asked its citizens to leave the area immediately.
US President Joe Biden vowed to keep up airstrikes against the Islamic State group whose suicide bombing at the Kabul airport killed scores of Afghans and 13 American soldiers.
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The Pentagon said the remaining contingent of US forces at the airport, now numbering fewer than 4,000, had begun their final withdrawal ahead of Biden's deadline for ending the evacuation on Tuesday.
After getting briefed on a US drone mission in eastern Afghanistan that the Pentagon said killed two members of the Islamic State group's Afghanistan affiliate early on Saturday, Biden said the extremists can expect more.
Biden warned that the strike "was not the last,” and the US "will continue to hunt down any person involved in that heinous attack and make them pay.”
The Pentagon released the details of those killed in Thursday's suicide bombing. It included 11 Marines, one Navy sailor and one Army soldier. Twelve of them were in the 20s; some were born in 2001, the year America's longest war began. The oldest was 31.