Multiple rockets fired at Kabul airport
Initial reports did not indicate any US casualties, but that information could change, the official said.
Earlier on Sunday, American forces launched a drone strike in Kabul targeting a suicide bomber in a vehicle who was aiming to attack the airport.
There is increasing concern that Islamic State militants will launch further attacks on the airport as US troops hurry to evacuate remaining American citizens and at-risk Afghans, before competing their own withdrawal by Aug 31.
Officials had warned in the past that ISIS-K militants were looking to target the airport with rockets. But the United States has experience in countering such rockets, primarily in Iraq, and had already installed missile defence systems.
“We know that they (ISIS-K) would like to lob a rocket in there, if they could,” General Frank McKenzie, head of US Central Command, told reporters in Washington last week.
“Now we actually have pretty good protection against that. We have our anti-rocket and mortar system,” McKenzie said.
There is greater concern about suicide bombers and car bombs attacking the airport, after a suicide bomb attack on Thursday that killed scores of Afghans and 13 US service members.