article_snippet: Scroll down for video .
article_snippet: lockdown happened around 10am,  and the situation is now contained and not considered to be a serious threat.
article_snippet: K9 alerted on a vehicle at 16th and Constitution at approx.
article_snippet: 10:10 this morning,' Agent Brian Leary said in an email to The Hill. '
article_snippet: It is being investigated now.'
highlights_snippet: lockdown happened around 10am, and the situation is now contained and not considered to be a serious threat .
  