A pickup truck attack that killed four members of an immigrant family has shaken Canada, a country where immigrants are largely accepted, and drew denunciations on Tuesday from Canada’s prime minister, who called it a hate crime directed at Muslims.

The victims — two parents, two children and a grandmother — were on an evening walk when the driver of the truck struck them at an intersection in London, Ontario. The sole survivor was a 9-year-old boy, who was hospitalised.