Students at Dunedin High School have been evacuated due to a threat.
All students were taken to the football field while deputies investigated.
The Pinellas County Sheriff's Office said nobody was allowed in the building as deputies and a K-9 unit investigated a bomb threat made to the school earlier in the day Thursday.
Authorities searched for hours.
So far, the deputies report "no devices" have been found.
Students were dismissed several minutes early because of the threat.
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