SWAT teams fanned out across the facility and an FBI team was also on the scene, searching buildings for any additional suspects.
It took nearly two hours before officials lifted the lockdown, and shocked students and staff began streaming out of buildings. The university canceled classes for the rest of the day.
“I was right there,” student Joseph Noll told Columbus television station WBNS. “I just heard some screams, and I saw people running.”
Student Cydney Ireland told ABC she was walking out of class when she also heard screams.
“Everybody was running in any direction they possibly could, students were running out of the classroom building,” she said from her hiding spot in a locked bathroom.
Ohio State has roughly 60,000 students on the main campus in Columbus, which sprawls across more than 1,900 acres (770 hectares).
(Sourced from agencies, feature image courtesy:abc7ny.com)