Someone fired shots at the Pentagon early Tuesday in what security officials described as "a random event."
No one was injured in the predawn incident in which shots were fired into two windows at the sprawling Defense Department just across the Potomac River in suburban Virginia.
Steven Calvery, director of the civilian Pentagon Force Protection Agency, told reporters that authorities would have to re-evaluate their assessment if they find the incident was part of a larger plot. He said authorities did not yet have any suspects.
Calvery said a number of his officers reported hearing five to seven shots fired at about 4:55 a.m. EDT near the south parking lot of the Pentagon. The building, and roads leading to the property, were shut down as officers did an initial sweep of the area. They were reopened 45 minutes later.
An internal search of the building found fragments of two bullets still embedded in two windows - one on the third floor and one on the fourth. The bullets had shattered, but did not penetrate, the windows, Calvery said. The windows were part of offices that are being renovated and they were unoccupied at the time.