Police tell CBC News they have detailed images from surveillance video captured inside and outside the restaurant, some of which they may release at a news conference on Tuesday.
Police are working on identifying everyone who appears in the video.
The shooting happened just after 4 a.m. Sunday at the popular restaurant, located at Chestnut and Dundas streets.
The victim has been identified as Tariq Mohammed, a 31-year-old man from Mississauga.
Two women in their 20s were also injured. One was shot in the chest, the other in the abdomen. Their injuries are not life-threatening.
Police say that a group of around six people were sitting at a table when an altercation broke out involving a man and a woman at that table and a handful of men in the restaurant.
Things escalated and at least one of the men pulled out a firearm. Two suspects fled south on Chestnut after the shooting.
At the time of the shooting about 30 people were inside the restaurant, which is a popular spot for diners after bars close.
Police have released the following descriptions of two suspects:- The man police describe as "the shooter" is a black man with a dark complexion and a lanky build, around five-feet-ten-inches to five-feet-eleven-inches tall. He wore a black hoodie and a black toque. The suspect is believed to be 20 to 30 years old.
- The second suspect is believed to be the same age. Police say he is black, has a dark complexion and a stocky build, shorter than the man who police believe fired the shots, and wears cornrows to his neck. He wore a dark hoodie with a logo or some type of writing on the front. He is described as having "bulging" eyes.
Anyone with information is asked to contact investigators at 416-808-7400, extension 77387. Tips can be passed on anonymously through Crime Stoppers at 416-222-8477.