| UPDATED: 17:36, Mon, Jan 18, 2021 Link copied Washington: Capitol building 'on lockdown' due to 'external threat' Sign up to receive our rundown of the day's top stories direct to your inbox SUBSCRIBE Invalid email When you subscribe we will use the information you provide to send you these newsletters. Sometimes they'll include recommendations for other related newsletters or services we offer. Our Privacy Notice explains more about how we use your data, and your rights. You can unsubscribe at any time. Officers issued the urgent warning as a presidential inauguration rehearsal was underway, just two days before Joe Biden is sworn in. Participants outside the Capitol were rushed inside the building, according to a witness. People were then told to stay put while police investigated the threat. The warning was announced on a loudspeaker at the landmark location.