(CBS/AP)-- Tennessee has identified nine more cases of children who died during the past two years while in the care of the state's Department of Children's Services.
The nine additional cases were uncovered as officials prepared for a federal court hearing Friday.
Republican Gov. Bill Haslam said in a statement Thursday that some of the newly-discovered cases were documented incorrectly, while others weren't documented at all, a situation he called "not acceptable."
A Nashville judge this week ordered the department to provide more detailed information about children who died or nearly died after the agency investigated reports of abuse or neglect.
The department initially produced a report containing only one line of information on the cases of 151 children who officials said had died since 2009.