Update (5:18 p.m. 3/28/16) From The Hill:
The suspect has been taken into custody and was transported to a local hospital for treatment, he added without providing the man's name.
[Police Chief Matthew] Verderosa said no officers were hurt, though a female bystander suffered minor injuries.
He said police believe the man acted alone, adding that there is no reason to suspect terrorism. The suspect was a frequent visitor to the Capitol grounds, he added.
Update (3:39 p.m. 3/28/16) From Yahoo! News:
The White House was put on lockdown for several minutes, but that caution has been lifted, according to Yahoo News Chief Washington Correspondent Olivier Knox.
WGN is reporting:
The U.S. Capitol Police are telling staff in the Capitol complex to shelter in place after a report of gunshots being fired in the Capitol Visitors Center.
The White House also was put on lockdown because of the report.
The situation was apparently contained to the Visitors Center but no further information was immediately available.
A Capitol Police spokesman did not immediately respond to a request for comment.
The Associated Press inaccurately tweeted out the following: