Classes are cancelled at public high schools in Waterloo today over safety concerns.

Tara Thomas, Director of School and Community Relations for the Waterloo School District, said officials decided to call off classes at East, West and Expo High Schools because of a threat made on social media Tuesday night (Oct. 9, 2018). She emailed the messages that district officials sent out to all high school families after they learned of the threat.

Parents or guardians of students at Expo and West received the following message:

"This is Waterloo Schools calling with an update on the social media concerns we shared last evening. The police and school staff worked throughout the night to investigate this social media threat. Together we made great progress in resolving the issue; however, there is still additional investigation that needs to be completed prior to students returning to school. Out of an abundance of caution and to allow the police to complete their investigation, we are canceling school for Wednesday, October 10. Please know safety of our students is our first priority. We will resume school on Thursday, October 11."

The following message went to parents or guardians of students at East:

"This is Waterloo Schools calling to let you know that there will be NO SCHOOL for high school students today in Waterloo. Last evening, there was a threat made on social media that referenced West and Expo High Schools. Please know the social media comments did not reference East. The police and school staff worked throughout the night to investigate this social media threat. While we made great progress in resolving the issue; there is still additional investigation that needs to be completed prior to students returning to school. Out of an abundance of caution and to allow the police to complete their investigation, we are canceling school for our high school students today (Wednesday, October 10). Please know safety of our students is our first priority. All other schools will be in attendance, and we will resume school on Thursday, October 11."