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Police in suburban Philadelphia are investigating allegations of “ritual hazing” mainly by members of the football team at Conestoga High School, according to a report from CBS3.

CBS3 said detectives have visited the school and are interviewing as many 70 students for an alleged assault that may have injured a student. The hazing occurred on the same day each week, a day that students told detectives they avoided the gym at certain times.

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No charges have been filed and no students have been disciplined, according to the report.

A school district spokesperson referred comment to the to the Chester County District Attorney’s Office. That office declined to comment.

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