Gunfire erupted inside a suburban Ohio school Monday, sending panic and chaos throughout the halls as teachers and students scurried to stay safe.
One student was killed in the shooting at Chardon High School, and four others were injured. The gunman, believed to be a student, was eventually taken into custody after a teacher chased him out the building.
"Everybody just started running," said 17-year-old Megan Hennessy, who was in class when she heard popping noises. "Everyone was running and screaming down the hallway."
Chardon High is about 30 miles east of Cleveland, and about 1,100 students attend the school.
Witnesses said the shooter appeared to be targeting a group of students sitting in the cafeteria. Fellow student Danny Komertz, 15, described the gunman as an outcast who was bullied.
Authorities are now trying put the pieces together to find a motive and learn more about the sequence of events that led to the attack.
Investigators said that, shortly before opening fire in the busy cafeteria at about 7:30 a.m. ET, the gunman tweeted that he was going to bring a gun to school. Many students were eating breakfast and studying as he started shooting.
Frantic parents raced to the scene Monday morning searching for answers.
"I have not been able to get a hold of my kids unfortunately, so I'm trying to figure out whatever information I can," one parent said shortly after news of the shooting broke.
Many arrived at the school after receiving frightening phone calls and text messages from their children on lock down inside.
"My little cousin is a freshman there. She was in the cafeteria and heard the shots, but she is okay," one person at the scene said.
"I was in French class and two girls came back and said someone got shot and we all just dove and went to the back of the classroom," a student recalled.
Emergency teams air lifted the shooting victims to two area hospitals, where one student died.
Chardon police said the young suspect, whose name is being withheld, turned himself in.
"I am happy to tell you that the student, the alleged student that did the shooting has been captured," Chardon Police Chief Tim McKenna said. "He is currently being held at the county jail center, and we have a lot of homework to do yet."
The high school is now considered a crime scene. Students ended their day at a nearby elementary school.