(WASHINGTON) -- The Food and Drug Administration denies that it targeted more than five of its scientists or any congressional staff, outside medical experts or journalists in a surveillance operation to identify who leaked confidential information to the media.
Sen. Charles Grassley, R-Iowa, called on the Justice Department this week to investigate what he deemed the FDA's "targeted spy ring" after thousands of documents collected by the agency's monitoring software was surreptitiously posted online last week, allegedly by accident.
The documents, which were first reported by The New York Times, had been collected from the government-issued computers of five FDA scientists who alleged that the oversight agency was approving medical devises that expose patients to dangerous levels of radiation.
That trove of information suggested that the spying operation extended not only to the five scientists, but included a list of 21 FDA employees, congressional officials, outside medical researchers and journalists that were thought to be putting out "defamatory" information about the FDA, the Times reported.
FDA spokeswoman Erica Jefferson said the agency is investigating the "data breach" and that the "enemies list" that the Times reported was "merely an internal summary of who the employees were corresponding with."
Grassley said the documents, which were hastily taken offline last Friday, made the FDA "sound more like the East German Stasi than a consumer protection agency in a free country."
In the documents, the agency referred to whistleblowers as "collaborators," called congressional staffers "ancillary actors," and dubbed journalists "media outlet actors," Grassley said Tuesday in a statement.
Because the scientists were using federally-issued computers, the FDA could legally track any emails sent on them. The agency could not, however, specifically target emails between its staff and Congress, the Department of Justice and the staff members' attorneys.
"Secret monitoring programs, spying on Congress and retaliating against whistleblowers -- this is a sad commentary on the state of affairs at the FDA," Grassley said Tuesday on the Senate floor.
Jefferson denied that the agency targeted congressional communications.
"Neither members of Congress nor their staffs were the focus of monitoring," Jefferson said in the statement. "At no point in time did FDA attempt to impede or delay any communication between these individuals and Congress."
Only one of the scientists targeted by the FDA's spy software still works for the agency. The other four were either fired or their contracts were not renewed.
All five of the spied-on scientists are now suing the agency for violating their constitutional rights to privacy and for stealing their private information, such as passwords to online banking sites that could have been recorded by the monitoring software.
"There were no boundaries in FDA," said Stephen Kohn, the lawyer representing the FDA scientists. "What started as a leak investigation metamorphosed within weeks to an explicit campaign to intercept communications to Congress."
The FDA denied that it recorded any such passwords.
Copyright 2012 ABC News Radio