Rockville High School was placed on “secure” status on Wednesday after Montgomery County police, Rockville police and U.S. Park Police responded to what turned out to be a “swatting call.”

Police said there was no validity to the initial report of an incident at the school.

The swatting call comes the day after the University of Maryland at College Park was targeted by a false report of an active shooting. There have been as many as 20 such false reports targeting colleges and universities across the country starting in late August, when students returned to campus.

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