The Adel Police Department is calling the incident a "terrorism threat."
The threatening letter that was found on campus at A-D-M Middle School and High School and forced them to cancel classes on Friday was a bomb threat, according to an update that was sent to parents by A-D-M Superintendent, Greg Dufoe.
The note was found outside the building prior to school starting, according to the email, and the building was "thoroughly" searched by the Adel Police Department, the Dallas County Sheriff, the State Fire Marshal, and the Waukee Police Department.
"Nothing was found of any concern at all during the search," Dufoe said in the email.
The Adel Police Department released a statement on Friday afternoon, saying that they have collected evidence and will be processing it at the state crime lab.
"A criminal investigation has been initiated to find out the author of the note and identify all involved in this terrorism threat," the news release said.
School has and will remain in session at DeSoto Intermediate and at Adel Elementary School and dismissal procedures will go on as scheduled.
"There was never any indication of a threat for those buildings, and that remains the case," Dufoe said in the email.
The Law Enforcement agencies involved will continue to investigate the situation.
If anyone has any information regarding this incident, please contact the Adel Police Department at 993-6723, or Lee Griebel, high school principal at 993-4584. Kim Timmerman, middle school principal, at 993-3490.
Those with information for the police department can remain anonymous, according to the Police Department News Release.
Original Story from Friday morning
Days after school was canceled in three Iowa School Districts due to threatening messages, A-D-M has now canceled school for its students in Adel on Friday morning after a threatening note was found on campus at the Middle School and High School facility.
According to an email sent to parents by A-D-M Superintendent, Greg Dufoe, the cancelation will allow for the Adel Police Department to conduct an investigation.
"We do not feel there is a real threat, but want to be cautious," Dufoe said in the email.
Just after 8 a.m., middle school students were evacuated from the building to the baseball diamonds and the high school students were evacuated to the football practice fields. The email said that they would keep track of students picked up by parents and that buses were routed back to buildings to take students home as well.
School remained in session for students at DeSoto Intermediate and Adel Elementary.