One person was taken into custody early Friday in connection with an investigation into a suspicious vehicle near the Pentagon, authorities said.
U.S. Park Police spokesman Sgt. David Schlosser said the man was in Arlington National Cemetery overnight, when it is closed, triggering an investigation. In the course of interviewing the man, police were directed to a car, he said.
"This is an unfolding situation," Schlosser said, adding that the proximity of the car to the Pentagon made the situation more suspicious.
Pentagon police spokesman Chris Layman said the car was in bushes near the Pentagon's north parking lot. One or two other people may have been involved, Layman said.
Police were investigating a suspicious package in the vehicle, said a U.S. official familiar with the investigation who spoke on condition of anonymity because the investigation was still under way.
In another incident earlier this week, a motorist found with a gun and what appeared to be a suspicious package near the Pentagon was taken into custody.
Associated Press writers Lolita Baldor, Jessica Gresko and Karen Mahabir contributed to this report.