On July 4, Peel Police responded to a gun-related call at the Mississauga Grand Banquet and Event Center at 35 Brunel Road just before 2:30 a.m.
Police found two men with stab wounds.
A man was found unconscious on the sidewalk and pronounced dead.
The second victim was taken to the trauma center with serious injuries.
The suspects involved in the incident fled before police arrived.
On Wednesday, police released images of seven persons of interest they would like to identify and speak to.
Anyone with information, surveillance video or dash cam footage that may have captured moments leading up to, during or after the incident is asked to contact police at 905-453-2121 extension 3205 or Crime Stoppers anonymously at 1 -800-222-TIPS ( 8477).