WASHINGTON (AP) — The National Security Agency on Thursday disputed a published report that secret intelligence budget files provided by agency leaker Edward Snowden show that the surveillance agency warned in 2012 that it planned to investigate up to 4,000 cases of possible internal security breaches.

The Washington Post, citing documents it said were provided by Snowden, said the NSA’s concerns about insider threats were aimed at “anomalous behavior” of agency employees with access to top secret data. The account cited NSA concerns about “trusted insiders who seek to exploit their authorized access to sensitive information to harm U.S. interests.”