This is stated in the message of the Anacostia-Bolling Joint Base on Facebook.
After the report of the penetration of an unknown person into the base, the personnel were advised to flee or barricade themselves in the event of a meeting with a suspect.
It is noted that the threat of the "presence of an armed person" has already been removed.
"The suspect has been detained and will be handed over to the Washington police," the statement said.
In April, a man was detained in the United States as he entered the territory of the Capitol.