Lansing Correctional Facility officials say a 59-year-old child sex offender has escaped.

The prison says Gary Leslie Furthmyer’s escape was discovered early Wednesday. He escaped from his minimum security assignment at a steam plant but further details were not available.

Furthmyer is serving a 6 to 25-year sentence for a 1985 conviction in Sedgwick County for indecent liberties with a child and aggravated failure to appear. He previously escaped in 1988 and returned to prison in 1993.