PORTLAND — Portland police say the man who was apparently shot to death on Congress Street this morning is a 41-year-old man, though they have not released his name.

The state Medical Examiner’s Office will perform an autopsy Tuesday after which the victim’s identity will probably be released, police said. Police have notified the victim’s family.

Witnesses reported hearing a gunshot then saw the victim running from the rear of 4 Massachusetts Ave., a three-story apartment building on the corner of Congress Street. The man ran out from behind the building, across the street and then collapsed in front of the Mobil gas station and convenience store at 1196 Congress St.

He was pronounced dead at the scene by paramedics.

Neighbors report there have been several late-night parties at the Massachusetts Avenue apartment building in recent days.

Earlier today, police were waiting to execute a search warrant at the address.

Acting Police Chief Michael Sauschuck said detectives have interviewed witnesses who heard the shots and saw the victim on the sidewalk.

Sauschuck said he’s not speculating on a motive as the investigation moves forward. No arrests have been made.

Police this morning had diverted traffic on Congress and Massachusetts Avenue while they recovered evidence. Traffic was restored by 9:30 a.m.