WASHINGTON — The U.S. Capitol and the buildings within its complex were on lockdown Tuesday as police investigated. The lockdown was lifted before 6 p.m.
There were no immediate details Tuesday. It marks the second time in less than a week that the Capitol was put on lockdown.
Police sent an email to congressional staff advising them to close and lock doors and stay away from external doors and windows.
Both the House and Senate were in session, with House members voting. In the Senate, lawmakers were delivering speeches from the floor.