- The Pentagon confirmed early reports on Thursday but declined to provide any details.
- It is unclear how many people may have been injured or killed.
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There has been an explosion outside Hamid Karzai International Airport in Kabul, where efforts to evacuate people out of Afghanistan are ongoing, the Pentagon said Thursday.
"We can confirm an explosion outside Kabul airport," Pentagon press secretary John Kirby said in a statement . "Casualties are unclear at this time. We will provide additional details when we can."