Campus authorities were notified around 10:30 a.m and were searching Oviatt Library for a suspect.
The suspect was described as a white male standing 5 feet 8 inches tall, wearing a white T-shirt with the words "Human Rights Violation" on the back. He has short, dark, spiky hair, denim shorts, and indicated that he had a gun.
At 1:15 p.m., the university released a statement saying the campus remained open, but Oviatt Library was closed. The statement advised: "Students, faculty and staff who feel uncomfortable may leave campus with proper notification to the faculty/supervisor."
At 5 p.m. the university stated the library would remain closed for the rest of the night: "We anticipate the library will open tomorrow morning at its normal time, and that the campus will be open and functioning normally."
The campus remained open Tuesday evening.
At about 8:30 p.m. Tuesday, CSUN announced that the person of interest was taken into custody. University Police, in cooperation with multiple law enforcement agencies, officially searched and cleared Oviatt Library.
If you have information related to the incident, call University Police at (818) 677-2111.