Manitoulin OPP investigates substantial mischief to Manitoulin Secondary Expositor Staff Jul 31, 2019 - 1 min read Inside doors were broken with a fire extinguisher, which was then discharged. Inside doors were broken with a fire extinguisher, which was then discharged. This post is for paying subscribers only Subscribe now and have access to all our stories, enjoy exclusive content and stay up to date with constant updates. Subscribe now Already a member? Sign in