Sûreté du Québec (SQ) police are helping investigators in Longueuil, Que., with a double homicide from Friday evening just south of Montreal.
The SQ dispatched a mobile command centre on Saturday in the parking lot of a strip-mall where the killings took place. A 42-year-old woman and a 34-year-old man were shot dead around 8:15 p.m.
Police say they found both bodies close to each other on the ground of the lot.
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The SQ issued a statement saying it was brought into the investigation because of the severity of the crime and due to the current context of gun violence in the region.
Initial information suggests the victims were targeted by gunfire from a vehicle that fled the scene before officers arrived.
There have been no arrests and investigators are trying to determine if the people involved knew each other and whether the shooting was a settling of accounts.