Calgary police are investigating after a man was found dead inside a bullet-riddled vehicle in Crescent Heights early Thursday morning.

Police were called to the intersection of 12th Avenue and Centre Street north at 4:20 a.m., where a man was reported to be in medical distress.

Officers found a man dead inside a vehicle in the middle of the intersection.

A firearm was also found at the scene.

The car discovered Thursday morning at an intersection in Calgary's Crescent Heights had a bullet hole in the door and a dead man inside. (CBC)

It's not yet known whether the incident was a targeted attack, said Staff Sgt. Asif Rashid.

"Suffice it to say that there's nothing to indicate that this was a random incident," he said.

A one-block radius surrounding the intersection was closed for several hours as homicide detectives and the medical examiner investigated.

Staff Sgt. Asif Rashid says it's not known yet whether the man was killed in a targeted attack. (CBC)

Police later cordoned off a house in the 200 block of 10th Avenue N.E. and are treating it as a potential crime scene.

An autopsy has been scheduled for Friday.

Anyone with information is asked to call police or contact Crime Stoppers.