Teen Gunman Kills Three Students, Teacher at Oregon Elementary School

A 16-year-old gunman killed three elementary school students and a teacher on Thursday at Silver Rail Elementary School in Bend, Oregon. The shooter, identified as John J. Griffin, critically injured another student and a teacher before being fatally shot by a bystander, according to authorities.

Sources indicate Griffin was armed with his mother's pump-action shotgun during the rampage. Law enforcement officials arrived at the school shortly after 1 p.m. to find Griffin already deceased. The motive for the attack remains under investigation.

The incident marks Oregon's eighth fatal mass shooting since 1998. Silver Rail Elementary School serves approximately 450 students.