LINCOLN, Neb. (AP) – Nebraska must turn over information to Arkansas death row inmates’ attorneys about where it acquired a drug that was used in a recent lethal injection.

A federal appellate court denied a motion Tuesday that would’ve given Nebraska a reprieve from carrying out the request.

Quinn Eaton is an attorney for the Arkansas inmates. Eaton told the court that information about where Nebraska’s prison system obtained fentanyl for an execution last summer is central to a federal civil rights trial in Arkansas.

He said the documents are relevant to their argument that Arkansas’ use of the drug midazolam in executions is inhumane. They have to show there’s an available alternative to reduce the risk of severe pain.

Nebraska has repeatedly refused to disclose the information.