PINELLAS COUNTY, Fla. --

UPDATE: Calvin A. Husinger has been cleared after a bomb threat was made; nothing was found.

It's still unclear who made the threat and why. The case is still under investigation.

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Calvin A. Hunsinger School at 1863 N. Betty Lane in Clearwater was evacuated due to an unspecified threat.

The school was shut down around 9:40 a.m. as Clearwater Police conducted its sweep of the campus.

Stay with 10News for more from this developing story.