No suspects have been arrested yet for a on Friday.
Waukesha County Sheriff’s Department Detective Steve Pederson said Monday the incident remains under investigation and no unusual activity has been reported at the school today.
School officials discovered a threat in a bathroom at the high school at the end of the school day. Police officials were called into the school to investigate threat, but officials suspected the threat wasn’t credible.
District spokeswoman Denise Dorn Lindberg said normal classes took place Monday and Project Graduation, a district-sponsored social function that marks the end of the school year, went off without incident on Saturday.