JACKSON, Miss. (AP) — A professor was killed in his office at Delta State University in Mississippi, an official said Monday, and the campus remained on lockdown after reports of a shooter on the loose.

The professor has been identified as Ethan Schmidt, who worked in the history department.

Murray Roark, deputy coroner in Bolivar County, says Schmidt was killed in his office Monday at Delta State University.

The suspect in the shooting has not yet been identified and remains at large. However, Warren Strain, a spokesman for the Mississippi Department of Public Safety, says the suspect is no longer believed to be on the campus.

He would not say how investigators reached that conclusion or say where the suspect is believed to be.

The 3,500-student university is in Cleveland, in Mississippi’s Delta region near the Arkansas-Mississippi state line.