Over 40 offices in the House of Representatives may have fallen victim to an “IT security violation,” according to a secret memo from top congressional law enforcement to the Committee on House Administration.

The memo, written in part by Paul Irving, the House’s sergeant at arms, detailed the disappearance of a server for the House Democratic Caucus following its marking as evidence in a cybersecurity probe. Imran Awan, email server administrator to former DNC chair Debbie Wasserman Schultz, and members of his family had logged into the server more than 7,000 times between 2015 and 2016 without proper authorization.