A man was shot to death this afternoon in Mattapan, according to Boston police.

Police responded to 1186 Blue Hill Ave at 12:22 p.m. today, according to Boston police Lt. Michael McCarthy.

Boston Police Superintendent in Chief William G. Gross said officers who responded "located a male victim approximately 28 to 30 years old suffering from a gunshot wound. Unfortunately, that male was pronounced dead on scene," he said.

Gross added: "At this time, it's a very active homicide investigation. Our officers are canvassing the scene and looking for any and all witnesses."

The slaying does not appear random, Gross said.

Investigators remain on the scene, and have roped off the block of small businesses.

A crime scene response truck and officers with the gang unit are also on the scene.

Developing …