MILWAUKEE -

Milwaukee police say an armed robber who was shot and killed by a would-be victim was a 15-year-old boy.

Police say the shooting happened Monday about 5:30 a.m. The name of the Milwaukee boy who was killed was not released.

Authorities say the suspect was one of four people who tried to rob a group of victims. One victim pulled out a handgun and fired, killing the suspect. The other three suspects fled.

Police say the 30-year-old West Allis man who shot the teen has been released from custody.

Milwaukee police have arrested five additional suspects believed to be part of a group responsible for dozens of robberies over the past several days.