Police say that a man who was dropped off at a downtown Calgary medical centre on Monday night has died of his injuries.

At about 9:00 p.m., police say a man ran into the Sheldon Chumir Centre and told staff that his friend had been shot and then fled the building.

Doctors went outside and found an unconscious young man in critical, life threatening condition. He was transported to the Foothills Hospital for treatment.

The victim, a man in his 20s, later succumbed to his injuries.

There was no sign of the car, a white Pontiac G5, that dropped the man off.

Police set up a perimeter around the building and scoured the area to try and find it.

At around 10:30 p.m., officers did stop what they believe to be the vehicle involved in the incident at 17 Avenue and 18 Street S.W.

Police say one man was detained for questioning. There are no details on what, if any, involvement he had with the incident.

He was later released but the car was seized as evidence.

Inspector Don Coleman with the CPS Major Crimes Unit says they believe the shooting took place in the area of 33 Avenue and 12 Street N.E. and two vehicles may have been involved.

"We don't know what that other vehicle is yet. It's still early. Investigators have been working hard on this since last night."

Beyond that, Colemand says that police don't have much else to go on.

"We are really encouraging anyone who may know something to fill in some gaps. We have a lot of questions."

Coleman says they have spoken with some people so far, but they have had little cooperation so far.

"Some information has come in but we are still looking for more information on the whole incident. We want to hear from anyone who may know where it occurred or what exactly occurred."

An autopsy on the victim is expected to take place later on Tuesday.

Anyone with information on this incident is asked to contact the Calgary Police Service non-emergency line at 403-266-1234. Tips can also be left anonymously by contacting Crime Stoppers using any of the following methods:

TALK: 1-800-222-8477
TYPE: www.calgarycrimestoppers.org
TEXT: tttTIPS to 274637