Caroline Downey of the National Review is reporting multiple US and civilian casualties at Kabul Airport suicide attacks. She writes (abridged):

An explosion erupted outside the Abbey gate at the Hamid Karzai International Airport in Kabul Thursday morning, resulting in multiple American casualties, Pentagon spokesman John Kirby confirmed.

We can confirm that the explosion at the Abbey Gate was the result of a complex attack that resulted in a number of US & civilian casualties. We can also confirm at least one other explosion at or near the Baron Hotel, a short distance from Abbey Gate. We will continue to update.

— John Kirby (@PentagonPresSec) August 26, 2021

At least three U.S. servicemen were injured in the blast, Lucas Tomlinson of Fox News reported.

The assault was reportedly perpetrated by a suicide bomber armed with an improvised explosive device. The suicide bomber was affiliated with ISIS, a U.S. official told Politico.

A firefight followed the detonation, according to Fox News’s Jennifer Griffin.

Shortly after the first blast, a second explosion occurred outside the Barron Hotel, where Afghans and Americans have gathered while awaiting evacuation. It’s unclear whether Americans were injured in that blast.