A hacker group has breached several FBI-affiliated websites and uploaded their contents to the web, including dozens of files reportedly containing the personal information of thousands of federal, state, and local law enforcement officers who have attended the FBI National Academy.

The hackers breached three sites associated with the FBI National Academy Association. The hackers exploited flaws on at least three of the organization’s chapter websites and downloaded the contents of each web server, TechCrunch reports.

The hackers then put the data up for download on their own website. The spreadsheets contained about 4,000 unique records after duplicates were removed, including member names, a mix of personal and government email addresses, job titles, phone numbers and their postal addresses.

Saturday the FBINAA said it was working with federal authorities to investigate the breach. “We believe we have identified the three affected Chapters that have been hacked and they are currently working on checking the breach with their data security authorities.”

One of the hackers interviewed by TechCrunch claimed to have “over a million data” [sic] on employees across several U.S. federal agencies and public service organizations.

The Associated Press counted at least 1,400 unique records of employees of the FBI, Secret Service, Capital Police, and other federal agencies as well as police and sheriffs’ deputies in North Carolina and Florida.