LINCOLN, Neb. (AP) — Six inmates alleging overcrowded conditions have asked a district court to let them sue the Nebraska Department of Correctional Services without paying a filing fee.

Last week’s filing in Lancaster County District Court says the state Diagnostic & Evaluation Center in Lincoln exceeded its design capacity by more than 298 percent as of April 30.

Michael Sather, Dustin Krogman, Wayne Saul Jr., Dylan Aufdengarten, Edward Bean and Jason Spencer are listed on the filing. Sather says overcrowding, unclean conditions, noise and limited bathroom access are causing prisoners mental and physical ailments.

The state’s Correctional Services Department says it doesn’t comment on pending litigation.

In November two other inmates sued the department, alleging over overcrowding at the state prison in Tecumseh.