Windows were smashed and property was damaged as dozens of masked demonstrators marched through downtown streets in Montreal for what is referred to as May Day.
A woman was declared dead at the scene of a fire in the Pointe-aux-Trembles district of Montreal. Police say a 29-year-old woman was arrested Wednesday.
Four cars were set ablaze in the parking lot outside a garage in the Hochelaga-Maisonneuve neighbourhood late Monday. A can of gasoline was found left at the scene.
Montreal police said an 'incendiary device' was thrown through the window of a landscaping business in Saint-Laurent early Tuesday in what police are calling a targeted arson.