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DOUGLAS COUNTY, Colo. (KDVR) — Douglas County schools will have extra security on Friday after shooting rumors spread through the district, according to the Douglas County Sheriff’s Office.

The Sheriff’s Office said in a tweet at 11:24 p.m. Thursday that the rumors “have been found to be false,” but extra security will be implemented “out of (an) abundance of caution.”

The rumors reportedly targeted “several” schools, including Douglas County High School in Castle Rock and Ponderosa High School in Parker, according to the Sheriff’s Office.