Two Ohio teenagers forced to sleep in cages have sued their adoptive parents and caseworkers who arranged the adoptions.

The lawsuit was filed Tuesday in Cuyahoga County Common Pleas Court in Cleveland on behalf of 18-year-old Sharen Gravelle and 17-year-old Michael Gravelle.

Their adoptive parents, also named Michael and Sharen, are now serving two-year prison terms for abusing some of their 11 adopted special-needs children.

The suit also targets caseworkers and the Hamilton County Department of Job and Family Services in Cincinnati. The suit says the Gravelles were unfit to be parents and should never have gotten custody of the children.

The prosecutor's office, which handles legal matters for the county agency, had no immediate comment Thursday.