The CIA said its security personnel took a person into custody early Thursday after an engagement outside the intelligence agency's headquarters.
A CIA spokesperson confirmed security staff "engaged a person" outside the main gates, adding the individual was in custody.
The spokesperson declined to say whether gunfire struck the suspect or to disclose any other details.
NBC News reported earlier that the person was shot, citing a person with knowledge of the matter.
The incident occurred around 4:00 AM (0800 GMT), a Fairfax police spokesperson told ABC News.
The CIA closed the main gate at its Langley compound and directed employees to seek alternate routes.
The shooting incident came after two Israeli Embassy staffers were killed by a lone gunman in downtown Washington on Wednesday night. There was no indication the incidents were related.
Passenger bus crash in Indonesia kills at least 16 people
Japan prepares to restart world's biggest nuclear plant
Remaining 130 abducted Nigerian students have been released, official says
Failed homemade bombs thrown before Bondi shooting, police tell court
Malaysia court denies ex-PM Najib's bid to serve jail sentence at home
Australian PM booed as Bondi Beach attack victims honoured
Kremlin: Revised US proposals don't improve peace outlook
Nine killed, 10 injured in shooting in South Africa
