Two drugmakers say that the city of Chicago wants to release materials it gathered from its investigation of opioid painkillers in order to try its case in the media, not to comply with Illinois’ Freedom of Information Act.

Janssen Pharmaceuticals Inc. and Cephalon Inc. are two of the defendants in the lawsuit Chicago is prosecuting against opioid drugmakers. USA Today has requested some of the materials Chicago’s lawyers gathered in its pre-complaint investigation and referenced in the city’s complaint.