Possible Active Shooter Reported at US Capitol, Senate Staff Urged to Shelter in Place

U.S. Capitol Police have locked down and evacuated the Russell Senate Office Building in response to a possible active shooter, although the reports have not been substantiated. Officers are currently searching the area, and access to the underground tunnels leading to the Senate office buildings has been blocked. While the Russell building was evacuated, the security posture at the Capitol building itself remains calm but alert. Most lawmakers are currently away for the August recess, but staff members still report to their offices on Capitol Hill.