A man has died in the Queen Elizabeth Health Sciences Centre after a fight at a bar in Halifax early Saturday morning.

James Philip Mattatall, 23, of Dartmouth, was found on Argyle Street in front of a bar unconscious and unresponsive just before 3 a.m. by police.

Police say the fight started inside a bar and continued outside. The victim was knocked to the ground by another man.

Police released pictures of a man who is believed to have been in the area in hopes of identifying him.

Investigators are interested in speaking with the man as he may be able to provide information about the incident.

He is described as a white man in his twenties, tall with a thick build and short dark hair. At the time of the incident he was wearing dark-rimmed glasses, a chain around his neck, blue jeans, a light-coloured ball hat with a logo on the front, a light-coloured shirt and a light-coloured hooded sweatshirt with a letter or logo on the left side and words across the back.

Police are asking this man or anyone with information about the man’s identity or this incident, to contact police.

Saturday's death is Halifax's 17th homicide in 2011.