Toronto police responded to reports of shots fired in the area of ​​University Avenue and Adelaide Street around 5:20 a.m.
A man in his 30s was found with a gunshot wound to his abdomen, police said.
He was taken to the hospital in serious, non-life threatening condition.
No suspect information has been provided at this time.
“The investigation is in its early stages but it appears to be some sort of street fight.  It is not clear if the person who was shot was part of the fight or an innocent bystander,” Insp.  Saleem Husain said on stage.
Officers are canvassing the area for any witnesses and surveillance video.
Adelaide Street was closed from University Avenue to Simcoe Street for the investigation, but has since reopened.
Anyone with information is asked to contact police at 416-808-5200, 416-808-2222 or Crime Stoppers anonymously at 1-800-222-8477.