This post has been updated

Police are investigating a shooting in Kingsessing that left a 25-year-old man clinging to life Tuesday afternoon.

Around 5:25 p.m., the victim was at his house on 53rd Street near Springfield Avenue with three men approached the screen door, police said.

As the victim walked toward the door, one of the men pulled out a gun and fired through the screen, police said.

The bullet pierced through the victim's underarm and came to a stop in his chest. The man was taken to the Hospital of the University of Pennsylvania and was listed in critical condition.

Police said the shooting may have been retaliation for an earlier robbery.

Detailed descriptions of the suspects were not immediately available. However, police said one of the men in the group had no teeth.