Tucson Police issued an "all clear" at Desert View High School after investigating a bomb threat this morning.
According to an email from the Sunnyside Unified School District, no explosive devices were found, and teachers and staff members have been allowed back in the school.
The school was evacuated because of a threatening note was found, and the district decided to send the students home for the day, police said.
An off-duty Tucson Police officer, who works at the school in security, found a note taped to a wall this morning.
It was concerning enough, Tucson Police Sgt. Maria Hawke said, that school buildings were evacuated and students were sent to the parking lot.
Later, the school district decided to send the students home, Hawke said.
According to a news release from the district, Desert View students who are normally picked up by parents can be picked up by parents at Gallego Basic Elementary School at 6200 S. Hemisphere Place.
Buses were dispatched to transport students home.
Hawke said two bomb-sniffing dogs, one from the University of Arizona Police Department and one from TPD, were used to search the campus.
Hawke said police did not consider it to be a credible threat, but chose to be cautious.
"We were concerned enough that we erred on the side of caution in asking students to evacuate," Hawke said.
Desert View is in the Sunnyside Unified School District on Tucson's south side.
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