Reports began flying in to DCist this morning that offices inside the U.S. Capitol were placed under lockdown and workers were instructed to secure all doors around 11:30 this morning. At this time, the situation has apparently been cleared and that warning lifted. Sources tell DCist that there was some sort of arrest being conducted outside of the building which led to the lockdown alert. Todd Zwillich, a Washington correspondent for Public Radio International, reports via Twitter that a Capitol Police officer told him that they “have a suspect in custody” who “was picked up outside Hart [Office Building], in an apparent suicide-by-cop attempt.” Obviously, more on this incident as details come to light.