No information on a suspect or arrests was immediately released.
A large police presence remains in the area. Salsa in Toronto is a Latino themed cultural celebration.
The incident comes soon after another shooting in Montreal late last month, where two people, including a police officer, were killed by an assailant who was then shot dead by law enforcement.
In February, a school shooting in the small western mining town of Tumbler Ridge killed eight people, including the shooter’s mother and half brother, and injured 27 before she took her own life.
Two people were killed and three others wounded in a shooting Saturday near a Toronto street festival, prompting police to warn of an active shooter before later saying the scene had been secured.
