Ohio police say the convicted killer of three students at a high school cafeteria has escaped from prison and a search is underway.

Police say 19-year-old T.J. Lane escaped Thursday night along with two other inmates and one of the inmates was captured.

Police say a search is underway in the woods and residential area near the prison and the two escapees are considered dangerous. Authorities say they do not believe they are armed, however. They had no further information on how the two men got out of the prison.

Lane pleaded guilty last year to shooting three students in February 2012 at Chardon High School, east of Cleveland. He said he didn't know why he did. He was given three life sentences.