Montreal police say they received multiple 911 calls at 3:10 a.m. Sunday morning reporting several shots fired in Old Montreal.
Police spokesperson Manuel Couture said the incident occurred on Notre-Dame and St. Francois Xavier streets, where police found shell casings on the ground.
Police say witnesses saw a group of men speed away in a car. Authorities located the vehicle and arrested three men, two 23-year-olds and one 29-year-old, who were attempting to run away on foot.
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A fourth man, the driver, took off in the car and remains at large.
Couture said a firearm was located near the scene.
There were no injuries and an investigation is underway.