MONTREAL -- For the second time in less than a week, Montreal police are being criticized for their treatment of people of colour after a video was widely shared showing an incident involving a young child.

A video that began circulating Thursday shows a young woman yelling at a group of officers for pointing guns in the direction of her four-year-old son after being pulled over Wednesday afternoon in Montreal's west-end NDG neighbourhood.

One witness says two women were stopped, calmly stepped out of the car and cooperated — but police kept guns trained at them and at the car, where a child sat in the backseat, for several minutes.