Waterloo Regional Police are investigating after a note was posted in a washroom at Huron Heights Secondary School threatening a school shooting.

Police say they received a report from staff at the school in Kitchener on Tuesday.

"We take this very seriously. Anytime a student makes a threat of action or even verbal threats against the school or any member of the school community, we take that very seriously," said Ron Deboer the superintendent with the Waterloo Regional District School Board.

A staff member located the message around 6 p.m. Tuesday on a washroom stall.

The message read “School shooting March 28! Not a joke. Watch out.”

Police, along with school officials, are investigating to determine the author of the message and the motive behind it.

"We have a protocol in place. We work with the police very carefully in finding out who it is. If someone’s doing it as a joke or a prank, we take it just as seriously and that person’s going to be met with severe consequences when we find out who it is," Debeor said.