The police responded to reports of a shooting at the Florida State University campus in Tallahassee on Thursday, officials said.

The Tallahassee Memorial HealthCare system said it was taking in patients related to the episode at Florida State.

Gunshots were reported at the student union building shortly after noon. About half an hour later, the university issued a shelter-in-place alert and canceled all classes and athletic events for the rest of the day.

The Tallahassee Democrat reported that a police spokesperson said there was one person in custody and that there were multiple injuries.

The campus police said that the situation remained active, and they did not release any information. Officers began evacuating academic buildings soon after the shelter-in-place alert went out. Campus officials told students to stay in place until officers reached them.

The F.B.I. in Jacksonville said in a statement on social media that it was assisting with the response.

Local and state police were on campus escorting students from the buildings near the student union.

The last day of classes is next Friday.

This is a developing story.

Valerie Crowder contributed reporting from Tallahassee, Fla.