Atlanta police say the shooting -- which is believed to have been part of an attempted robbery -- happened around 11:30 p.m. Sunday at the business near Forest Park Road Southwest.
Police say that officers arrived to find a pick-up truck in the middle of the road with a man dead from apparent gunshot wounds in the passenger seat.
CBS Atlanta reports that police also found a younger man suffering from gunshot wounds around the corner on Rebel Forest Drive. He was taken to Grady Memorial Hospital, where his condition was unknown.
Police tell WSB-TV that security guards were involved in the shooting.