A spokesperson for the Toronto District School Board said the "isolated incident" happened Thursday evening at RH McGregor Elementary School in East York, Ont.
Clad in dinosaur, princess and witch costumes, students at R H McGregor Elementary School took part in a series of Halloween-themed events to celebrate spooky season.
Police across the GTA have released some safety tips for trick-or-treaters, parents and drivers on Halloween night. Motorists are advised to slow down in residential areas, and watch for children, especially after dark. Older children should create a “buddy system” to help get each other home safely and prevent walking alone.