Deputies say they found no devices at Dunedin High School, which had earlier been evacuated after officials reportedly received a bomb threat.
Deputies responded to the school shortly after 11 a.m. after learning about the threat.
The school was evacuated while a K-9 unit conducted a sweep of the campus, located at 1651 Pinehurst Rd.
At 1:35 p.m., the time of dismissal, all students were reported safely off campus, and the campus was reported clear.