The Justice Department obtained secret records as part of a year-long investigation into the disclosure of classified information about a failed al-Qaeda plot last year.
The Associated Press, which is headquartered in New York, alleged the Justice Department obtained two months phone records - mostly outgoing -- of its several offices in particular those in New York and Washington, and several of its reporters and editors.
"AP is asking the DOJ for an immediate explanation of the extraordinary action and for the records to be returned to AP and all copies destroyed," it said.
The news agency termed it as a serious interference with its constitutional rights to gather and report the news. It called the Justice Department's actions a "massive and unprecedented intrusion" into newsgathering activities.
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Demanding the return of the phone records and destruction of all copies, Pruitt in his letter to Attorney General Eric Holder said there can be no possible justification for such an overbroad collection of the telephone communications of The Associated Press and its reporters.
"These records potentially reveal communications with confidential sources across all of the newsgathering activities undertaken by the AP during a two-month period, provide a road map to AP's newsgathering operations and disclose information about AP's activities and operations that the government has no conceivable right to know," Pruitt said.
The news first released by the Associated Press itself immediately drew widespread criticism.
The White House immediately tried to distance itself from the alleged probe by the Department of Justice.
"Other than press reports, we have no knowledge of any attempt by the Justice Department to seek phone records of the AP," White House Press Secretary Jay Carney said.
"We are not involved in decisions made in connection with criminal investigations, as those matters are handled independently by the Justice Department," he added.