FPD officers worked to secure the area and negotiate with the man while NAU Police Department officers acted as a barrier to prevent him from going onto the campus.

NAU sent an update to students at 12:25 a.m.

"Law enforcement on scene," it said. "Situation is contained at this time to the Knoles Parking Garage. Continue to avoid the area."

Officers negotiated with the suicidal man. At one point, he did fire the BB gun. No injuries were reported.

FPD took the 19-year-old suspect into custody at approximately 12:40 a.m. Monday. He was arrested and charged with discharging a BB gun within city limits. He was booked into the Coconino County Detention Facility.

NAU sent students the all-clear telling them there was no more threat within minutes of the arrest. No students were in immediate danger during the confrontation.

It is unclear whether the suspect had any connection to NAU.