Four people, including three children, were killed by an active shooter on Thursday at an elementary school in Bend, Oregon.

The victims included a 5-year-old, an 8-year-old, an 11-year-old, and a teacher, Bend Police Chief Mike Krantz said. The 16-year-old gunman was killed after a member of the community followed him inside the school and shot him. Two people, a 7-year-old and a 54-year-old teacher, were hospitalized with critical injuries.