Catholic University of America officials say a second shelter-in-place order on the campus in 24 hours was prompted by a sighting of a person who resembled a person suspected of making threats the night before.

In an email to the campus community, President John Garvey said that after a conversation with the man spotted Tuesday night it was clear he "had every right to be on campus" and the order was lifted. Garvey says there's no concern about resuming normal activities Wednesday, but because schedules may have been upset, classes will start at 11 a.m.

Garvey says a custodian's report of an armed man making "terroristic threats" Monday night, which prompted the first shelter-in-place order, is being investigated by D.C. police and the FBI's Joint Terrorism Task Force.