The Internal Revenue has received 6,400 more Lois Lerner emails but is delaying releasing them. The reason? It’s reviewing the emails for duplicates.

Department of Justice lawyers representing the IRS submitted a court filing in the Judicial Watch v. Internal Revenue Service case, the Daily Caller reports. According to the filing, the IRS received the emails from the Treasury Department’s inspector general on May 8 and June 1. Yet the IRS claims it cannot release the emails to the nonprofit Judicial Watch, which is suing the IRS for the emails.