LINCOLN, Neb. (AP) — More than two dozen Nebraska inmates who have spent time at an overcrowded Lincoln prison are suing the state prison system and its director, alleging conditions at the prison violate their civil rights.

Two separate lawsuits were filed in U.S. District Court in Lincoln on Tuesday. One lawsuit is by a group of a dozen inmates and the other is by a group of 17 inmates seek class-action status.

All men sentenced to prison start their time at the Diagnostic & Evaluation Center in Lincoln, where they are evaluated before being sent to the state’s other prisons to finish out their sentences.

The state says the Lincoln prison was at 335 percent of capacity at the end of April.