Pentagon press secretary John Kirby confirmed reports of an explosion outside of the airport in Kabul, Afghanistan, on Thursday morning.
"Casualties are unclear at this time," he wrote in a tweet. "We will provide additional details when we can."
The White House, State Department, Pentagon and U.S. Embassy in Kabul have all been warning of heightened threat from ISIS-K militants in Taliban-controlled Afghanistan to the ongoing evacuation effort there.
In a security alert on Wednesday, the U.S. Embassy in Kabul urged Americans outside the gates of the airport to leave the area immediately, citing security threats. Officials also cautioned U.S. citizens against travel to the airport.
This is a developing story. Some things reported by the media will later turn out to be wrong. We will focus on reports from officials and other authorities, credible news outlets and reporters who are at the scene. We will update as the situation develops.
This story originally appeared on the Morning Edition live blog.
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