The incident happened during the Salsa on St. Clair festival, where thousands of people had gathered.
The shooting took place on Saturday at the Salsa on St. Clair festival in midtown Toronto.
Police described it as an active shooter situation and said around 13,000 people were attending the event.
According to officials, two groups exchanged gunfire, leaving two people dead and four others seriously injured.
Police recovered two firearms from the scene, but no arrests have been made so far.
Officers sealed off the area and asked the public to stay away while the investigation continues.
