IRS whistleblower in Hunter Biden probe alleges agency removed his 'entire investigation team'

Attorneys for an IRS whistleblower have informed key members of Congress that their client, who claims to have information suggesting the Biden administration could be mishandling the investigation into President Joe Biden's son, Hunter Biden, has been removed from the probe into the president's son.

According to a letter obtained by ABC News, the whistleblower's attorneys on Monday notified several House and Senate Committee chairmen, both Democrats and Republicans, that their client -- along with his "entire investigative team" -- had been removed from the probe.

The attorneys wrote in the letter that the whistleblower had been "informed the change was at the request of the Department of Justice."

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"[T]his move is clearly retaliatory and may also constitute obstruction of a congressional inquiry," the letter reads.

A DOJ spokesperson told ABC News in a statement, "The Department cannot comment on the matter. As to any investigation of Hunter Biden, as the Attorney General has said that investigation is being handled by U.S. Attorney David Weiss, who has full authority to make investigative decisions and to bring charges in any jurisdiction as he deems appropriate. I refer you to U.S. Attorney Weiss for any questions concerning his investigation."