A Florida corrections officer was fired after zapping children with 50,000 volts of electricity during a "Take Our Daughters and Sons to Work Day" tour.

Department of Corrections Secretary Walt McNeil has ordered an investigation of the April 24 incident at the Franklin Correctional Institution.

Sgt. Walter Schmidt says the parents gave him permission to shock the children with a handheld stun device. Such devices are typically used to subdue unruly or uncooperative inmates and must be in direct contact with the person to deliver the shock.

Schmidt was fired. Warden Duffie Harrison said Schmidt zapped "at least two kids."

The children's names and ages were not released.