Fourteen of the injured victims were children ages 6 to 15, and the three adults who were shot were parishioners in their 80s at Annunciation Catholic School in Minneapolis.
All of those injured are expected to survive. The shooter, identified by the FBI as 23-year-old Robin Westman, died at the scene from a self-inflicted gunshot wound, police said.
A motive remains under investigation. An 8-year-old and a 10-year-old were killed