A man was fatally shot Thursday night in south Minneapolis in what may have been a case of self-defense by another man who interrupted a robbery, police said.

Just before 10 p.m., police got a 911 report that someone had been shot in a parking area behind the Super Grand Buffet restaurant about a block west of Cub Foods near the intersection of Lake Street and Minnehaha Avenues, according to police spokesman Sgt. William Palmer. When police arrived, a man with a gun who said he had a valid concealed-weapon permit told them he had interrupted the robbery of a woman in her 60s. The man said that he chased the robbers, a male and a female, exchanged fire and killed the male robber.

Police took both the alleged female robber and shooter into custody while they investigate his account of the shooting. Two guns -- one from the slain man, one from the shooter -- were recovered, Palmer said.

No other information was available about the robbery victim.