An 11-year-old boy in Guelph has been warned by police after leaving a threatening voicemail to an elementary school in the city last week.

Police were called to Waverley Drive Public School Friday morning after staff reported the threat left on the voicemail overnight. Students and staff were moved to another nearby school for the day.

The canine unit from the Waterloo Regional Police Service helped search the school and Guelph police said in the early afternoon that nothing suspicious had been …