Nearly two dozen Tucson Police officers responded to the University of Arizona last month after reports of a gunman on campus prompted evacuations, records show.

The records, which Arizona Public Media obtained through a public records request, show TPD assisted the UA Police Department in clearing the Administration Building and keeping bystanders away from the building.

The incident began shortly before 5 p.m. March 22 when police dispatchers received two text messages from an unidentified person. The first message stated there was a man with a gun in the building, and the second message said there was a shooting. Police locked down, and then searched the building, and adjacent Modern Languages, Student Union Memorial Center and Second Street Garage.

About four hours later, the campus was deemed "clear" after police found no evidence of a gunman, injuries or shooting.

Last week, campus officials said the report was likely a hoax but have not released the identity of the person who reported the incident.

Tucson police records show 22 officers responded to assist UAPD. Many were assigned to keep an eye on the exterior of the building and keep people away. Others took part in the floor-by-floor, room-by-room search of the building, with a focus on the third floor, the records show.

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The TPD SWAT and Gang squads responded, and one officer said in her written report she brought ballistic shields and a mass casualty bag to the scene.

Another officer was stationed on the roof of the Student Union with a rifle to watch the west side of the Administration Building.