fire on a special educational needs class. As she tussled with him on the floor of the class - where three children and a teacher were killed - a bystander armed with a pistol ran inside and killed the teen. The bystander, a father of two girls at the school, had been driving past Silver Rail Elementary in Bend on Thursday lunchtime when he saw the suspect firing in the car park, then shooting through a window to enter. Police said the 16-year-old suspect used to be a student at the school. Police say the suspect was armed with about 44 more rounds of shotgun ammunition when he was stopped. He fired as many as 15 rounds in the class. "To the people who showed courage in the face of such violence, and intervened to prevent this tragedy from being any worse, we owe you a debt of gratitude," Bend Police Chief Mike Krantz said on Friday. Police offered more information on the attack at a news conference on Friday, where they identified two of the four victims. They include five-year-old Rhoam Summer and 25-year-old teacher Meghan Lambert. The families of the two other students who were killed, an eight-year-old and 11-year-old, did not wish to have them publicly identified yet, police said. Two others were injured in the attack. Another teacher, a 54-year-old, was still being treated at hospital, and a seven-year-old student, who was in serious but stable condition. (BBC)