Watch Live: Pentagon press secretary holds news conference after U.S. airstrike in Afghanistan

Pentagon press secretary John Kirby is holding a news conference Saturday after the U.S. launched an airstrike in Afghanistan targeting an ISIS-K  planner. The strike came one day after ISIS-K claimed responsibility for the attack at Kabul's airport that left at least 170 dead, including 13 U.S. service members.

"U.S. military forces conducted an over-the-horizon counterterrorism operation today against an ISIS-K planner," Captain Bill Urban, spokesman for U.S. Central Command, said in a statement Friday night. "The unmanned airstrike occurred in the Nangahar Province of Afghanistan. Initial indications are that we killed the target. We know of no civilian casualties." Earlier Friday evening, the U.S. Embassy in Kabul sent out an alert telling people to stay away from the Kabul airport due to "security threats," adding that those at four of the airport's gates should "leave immediately."