École Gaétan-Gervais, Montclair Public School, St. Michael Elementary, Munns Public School and École élémentaire du Chêne were also placed in hold and secure, police said.
The suspect was described wearing a blue and white t-shirt, black shorts and a backpack, according to police. There are no reported injuries and police said on Twitter that there is no ongoing threat to public safety at this time.
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