Just before 7:30 a.m., Pentagon Police saw a vehicle "with a wire protruding from the driver's door" and three unresponsive people inside, a statement from the Pentagon Force Protection Agency (PFPA) said.
"The vehicle was deemed suspicious and potentially dangerous," the agency said.
When the three occupants were asked to leave the car, they instead tried to drive away, PFPA said. All three were apprehended and taken into custody.
The driver's blood alcohol level registered at .113, according to PFPA; .08 is the legal limit for driving.
Bomb squads responded to the scene and sent a robot to search the vehicle, which was described as an SUV, ABC affiliate WJLA-TV reported.
No dangerous materials were found, PFPA said, and the scene was cleared just after 9:30 a.m.
The Pentagon Metrorail station was temporarily shut down due to the police activity.
Pentagon Police are investigating.
The Arlington County Police, who assisted with the investigation, could not be immediately reached by ABC News.