Here are some of the deadliest mass killings in recent Canadian history: : 17 people are dead, including the gunman, after a man who at one point wore a police uniform and drove a mock-up cruiser travelled across northern Nova Scotia.
An RCMP officer is among the dead. Police say the suspected shooter, 51-year-old Gabriel Wortman, was killed after being intercepted by officers in Enfield, N.S. : A gunman opens fire in Fredericton, N.B., killing two municipal police officers and two civilians: Const.
Sara Burns, Const. Robb Costello, Donnie Robichaud and Bobbie Lee Wright. Matthew Raymond is arrested and charged with four counts of first-degree murder. : Alek Minassian drives a white van along a crowded Toronto sidewalk, killing 10 people