A man was arrested by police officers while trying to pass through security at a Longworth House Office Building in Washington, D.C., according to Fox News.
According to reports, the suspect had a gun in his bag.
"The Longworth building — an office building of the US Capitol complex — was put on lockdown this morning after someone brought a gun into the building," CNN reported.
Police reported that there was no indication of any other security threat on Capitol Hill besides the one arrested man.