WASHINGTON (AP) — The special House committee investigating the 2012 attacks on the U.S. mission in Benghazi, Libya, will issue subpoenas for former Secretary of State Hillary Rodham Clinton's personal emails, congressional aides said Wednesday.

The move comes amid the disclosure that Clinton relied exclusively on a personal email account during her tenure as the nation's top diplomat. The committee, which already has tens of thousands of emails from the Obama administration, is seeking more information.

The aides said that possibly as early as Wednesday, the committee would seek the additional material from the potential 2016 Democratic presidential candidate.

The aides spoke on condition of anonymity because they were not authorized to publicly discuss the committee's actions.

Without confirming the latest development, a Republican on the Benghazi committee said Clinton is "known for her secrecy, but this shows just what lengths the Clintons will go to."

Rep. Martha Roby, R-Ala., added, "It's not a random personal account, but a carefully calculated system to avoid using public, government-archived email."

The committee is investigating the Sept. 11, 2012, attack on the U.S. facility that killed four Americans, including Ambassador Chris Stevens.

The Associated Press reported on Wednesday that a computer server that sent and received Clinton's emails — on a private account she used exclusively for official business while secretary of state — traced back to an Internet service registered to her New York home.

The Washington Post first reported about the subpoenas.

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Associated Press writer Matthew Daly contributed to this report.