At least 73 people have died, including 13 US service personnel, after two blasts and a gunfight outside Kabul airport.
An official has confirmed at least 60 Afghans were killed and 143 others were wounded in the suspected suicide bombings.
Islamic State affiliate, ISIS-K, said on its Telegram account it was behind the attack.
It happened close to where thousands of people have been desperately waiting to be evacuated out of the country.
Head of US Central Command, General Frank McKenzie, said 12 US service personnel were killed and another 15 were injured.
A 13th member of US service personnel died later. He confirmed about 1,000 US citizens are estimated to still be in the country.
General Kenneth McKenzie added that he expects IS attacks to continue, saying there are “extremely active” threats to the US in Kabul.
He said some information is being shared with the Taliban, and they have been asked to close some roads as the threat of a car bomb in Kabul is high but he does not believe the Taliban let the bombing happen.
He added that it is assumed the suicide bomber was being searched when the device went off, and despite the incident, the US evacuation mission will continue as planned.
The Taliban has “strongly” condemned the attack, which it said took place in an area where US forces are responsible for security.