The Perry County Sheriff's Office is investigating a threatening note found in a school in the Southern Local School District. Parents were notified of the situation via automated phone calls on Friday at MIller HIgh School. Authorities say it was found in a boy's restroom and it threatened three students and two teachers. Investigators say they have no suspcts. The school was not evacuated because the note was found late in the day.The Perry County Sheriff's Office is continuing its investigation.