Calgary police have one person in custody in connection with the suspicious death of a man at Olympic Plaza late Friday night and say they are not looking for anymore suspects.

The man was taken into custody shortly after the incident and is being described as a person of interest. He has not been charged.

Police say they received a 911 call at about 10:15 p.m. MT from a witness who said it looked like a man needed help. EMS was called in about 15 minutes later for what was originally believed to be an assault, but a man was later declared dead at the scene.

The victim, in his 20s, had slashes on his face and police say they do not believe the incident was random.

A CBC reporter on scene witnessed firefighters remove a grate and crawl into a service hole. They came back up with something in a brown paper bag.

The item was photographed, logged and taken away from the scene, at which point the crime scene tape was taken down. It's not immediately clear what the item was.

An autopsy will be done on Monday to determine cause of death.

Police say there could be charges laid later Saturday afternoon.