Biden's Inauguration Day rehearsal canceled, Capitol evacuated for 'external security threat'

The rehearsal on Capitol Hill on Monday for Joe Biden's inauguration was canceled, and those in attendance were told to evacuate as the result of an "external security threat," according to news reports and social media posts. 

The evacuation from the west side of the U.S. Capitol Building was being reported by The Daily Mail.

Fox News Congressional Correspondent Chad Pergram tweeted that the threat was under the bridge near the Capitol Building on I-295 at First and F streets, SE and that staff and other personnel are directed to avoid coming to the Capitol complex area until further notice. 

Another social media post, with a picture, states the fire is at a "homeless encampment."