DULUTH, Minn. (WCCO) — University of Minnesota Duluth police have taken one person into custody after responding to a report of a person with a gun at a building on the university’s campus.

The school tweeted two SAFEU Alerts around 9:30 p.m. Tuesday, telling students to shelter in place.

The tweets said the person who was allegedly carrying a weapon was seen in the medical or pharmacy school.

The school later tweeted that police had a suspect in custody and there is no longer a threat to campus. No weapon was found.