Police removed any threat to the individual and others well in advance of 6 a.m., when the first students were on site, according to the statement.
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Police have determined the discharge was an isolated incident.
West Milton Police Chief Harry Busse, in an email, said the village's law director advised to say publicly that "there had been an incident at the school, a shot was fired, a person was in custody, there was no threat to students, and the investigation was ongoing."
The chief met with district Superintendent Brad Ritchey on Thursday afternoon.
Police declined to release any information about the juvenile or the type of firearm used.
We are continuing to dig for answers for this developing report and we will give you an update.
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