T.J. Lane, Clifford Opperud, 45, and another unidentified man busted out of the Allen Correctional Facility in Lima Ohio Thursday night, prison officials said.
Authorities said they found Lane carrying a pitchfork a couple hours after his escape and took him into custody, Fox8 reported.
Opperud, who was convicted of kidnapping and aggravated robbery, was still at large Thursday night.
Residents were warned by officers to not open doors to strangers or pick up hitchhikers. Opperud was wearing blue prison clothing. Police were searching the area by using patrol cars, dogs and aircraft.
Lane was sentenced to three life sentences with no chance for parole after he killed three students and wounded three others at Chardon High School on February 27, 2012.
At his court appearances, Lane revealed that he wrote “KILLER” on his t-shirt, gave families of the victims the finger and said crude remarks while laughing.
Chardon school officials told ABC News that they were considering closing school on Friday as a safety percussion.
Daniel Parmeror, 16, Demetrius Hewlin, 16, and Russel King Jr., 17, died in the 2012 school attack.
Prison officials did not disclose how the inmates escaped.