A man died after he was shot in a Toronto nightclub and found by staff cleaning up after last call, police said Sunday.

Police have identified the victim as Jordan Armstrong, 33, of Markham.

Armstrong was discovered "suffering from obvious trauma" inside Orchid Nightclub at 82 Peter St., according to Const. David Hopkinson, spokesperson for Toronto Police Service.

Hopkinson declined to say where exactly in the nightclub Armstrong was found.

Last call is at 2 a.m. and police were dispatched to the club at 2:56 a.m., he said.

Paramedics rushed the victim to a trauma centre, where he was pronounced dead.

Hopkinson said investigators believe that the shooting occurred inside the club itself.

"There may be circumstances where he may not have been easily noticed, but that's something that homicide would have to comment on," Hopkinson said.

Toronto police's forensic sciences unit was on scene at the nightclub throughout the morning Sunday. (Muriel Draaisma/CBC)

Gun found near where man located

Police are appealing for the public's help in identifying the suspect.

"What I think is important is there were a significant amount of people in the nightclub. Forget about the time that he was found. We have to work backwards to try to find out what our victim was doing and who he was with," Hopkinson said.

"And somewhere, someone has a picture of our suspect on their phone. They were taking a selfie or a video of the club and they have captured him."

A firearm was recovered close by to where the man was found, he added.

Homicide detectives are investigating.

No one is in custody and no suspect description was available.