Three hundred and twenty-nine people, including 278 Canadians, killed when bomb explodes on an Air India jet flying from Toronto to Bombay in June 1985. Two British Columbia men were tried for murder but were found not guilty.
Fourteen women killed by anti-feminist Marc Lepine at Montreal's Ecole Polytechnique engineering school in December 1989. Lepine wounded another nine women and four men and fatally shot himself.
Thirteen people died after being herded into a storage room in Montreal's Gargantua nightclub in 1975. Some were shot but most suffocated when the building was set on fire in what was believed to be an underworld contract hit.
Nine people gunned down by Mark Chahal, a spurned son-in-law in Vernon, B.C., who killed his estranged wife, her bride-to-be-sister and seven other relatives before killing himself in April 1996.
Nine people slain in 1967 in Shell Lake, Sask., by Robert Hoffman, who was later sent to an Ontario mental institution.
Nine miners killed by deliberately set blast in Yellowknife's Giant Mine in September 1992. Roger Warren, a striking miner, sentenced to life in prison for setting the bomb during a bitter strike-lockout.
The bodies of eight men are found in four vehicles in a farmer's field near Shedden, in southwestern Ontario on April 8, 2006.
Seven people, including six children, murdered in 1965 by Leonard Hogue, a former Vancouver police constable, who then killed himself.
Bodies of six campers found in burned-out car in Wells Gray Provincial Park north of Kamloops, B.C., in 1982. David Shearing of Clearwater, B.C., confesses.
Bodies of four adults and a baby associated with the doomsday cult Order of the Solar Temple found in the burned-out remains of a chalet in Morin Heights, Que., in 1994. The couple believed responsible fled to Switzerland where they were among 53 cultists who were killed or committed suicide.
Five people found dead on a farm in Abbotsford, B.C., in September 1996. Police believed the killings were related to the drug trade.
Four employees killed at OC Transpo transit garage in Ottawa by co-worker Pierre Lebrun in April 1999. Lebrun, who had complained of ongoing harassment in the workplace, then killed himself.
Four members of engineering faculty at Concordia University in Montreal gunned down in 1992 by Valery Fabricant, a disgruntled colleague sentenced to life in prison with no parole for 25 years.
Three people killed by wild machine-gun fire in 1984 when Canadian Forces Cpl. Denis Lortie invades Quebec legislature. Lortie freed on day parole in 1995.
Three people killed and a fourth injured after a botched robbery at a McDonald's restaurant in Sydney River, N.S. in 1992. Three men handed life sentences for the triple-slaying.
Three shot to death in 1992 at Ontario Glove, a plant in Waterloo, Ont., by co-worker Patrick Dombroskie. He then drove to nearby Cambridge and surrendered to police.