(Fox News) — Acting ATF Director Kenneth Melson has been reassigned to a lesser post in the Justice Department and the U.S. attorney for Arizona was also pushed out Tuesday as fallout from Operation Fast and Furious reached new heights.

Melson’s step down from his role as head of the Bureau of Alcohol, Tobacco, Firearms and Explosives to the position of senior adviser on forensic science in the Department of Justice’s Office of Legal Programs is effective by close of business Tuesday, administration officials announced. U.S. Attorney for the District of Minnesota B. Todd Jones will replace Melson.

U.S. Attorney for Arizona Dennis Burke, one of the officials closely tied to Fast and Furious, is also a casualty in a shakeup tied to the botched gun-running program. Burke was on the hot seat last week with congressional investigators and, according to several sources, got physically sick during questioning and could not finish his session.

The purge of those responsible for the firearms trafficking scandal continued as new documents reveal a deeper involvement of federal agencies beyond ATF.

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