Story highlights Suit was filed by a human rights group on behalf of students at Worth County High after an April 14 incident

Parent: "The whole community is upset about this. Our children were violated and we're banding together"

(CNN) About 900 students at a Georgia high school were groped by law enforcement officers during a drug sweep that was conducted without a warrant and didn't yield any drugs, a federal lawsuit claims.

The suit was filed by a human rights group on behalf of students at Worth County High after an April 14 incident when about 40 officers showed up at the school without advance notice.

They put the school on lockdown for four hours and ordered many students into hallways, where they were forced to stand spread eagle, the lawsuit says.

According to the suit, officers cupped boys' genitals, touched girls' vaginas, reached inside bras, touched girls' bare breasts, patted their buttocks and placed their hands inside students' underwear. No drugs were found.

CNN was unable to contact Worth County Sheriff Jeff Hobby or his lawyer for comment. But the sheriff told CNN affiliate WALB the searches were legal -- despite not having warrants or permission from parents or the school system -- because school administrators were present during the pat-downs.

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