Police are searching for a person of interest after finding a stabbing victim in a Calgary stairwell.

 

Officers found the man Saturday after being called to an apartment on 6 Avenue.

 

The man was taken to the hospital and has undergone surgery. Police listed his condition as critical.

 

The scene has now been sealed off as police look for clues.

"Investigators have identified a person they wish to talk to, but have not yet located that person," police said in a release.