According to Axios boss Mike Allen, special counsel Robert Mueller secretly got his hands on “many tens of thousands,” of emails exchanged by Trump transition officials. Trump lawyer Kory Langhofer penned a blistering response to the news, accusing Mueller of unlawfully obtaining transition documents.

BREAKING NEWS: Trump lawyer: Mueller improperly obtained transition documents in Russia probe https://t.co/cCOzJX3OV1 pic.twitter.com/IqhdlNTqNw — Fox News (@FoxNews) December 16, 2017

FOX News reports:

A lawyer for the Trump presidential transition team is accusing Special Counsel Robert Mueller’s office of inappropriately obtaining transition documents as part of its Russia probe, including confidential attorney-client communications and privileged communications. TRENDING: BREAKING: 'At Least 10 Shots' Reportedly Fired at Police By Louisville Black Lives Matter Rioters — UPDATE... At Least Two Officers Shot (VIDEOS) In a letter obtained by Fox News and sent to House and Senate committees on Saturday, the transition team’s attorney alleges “unlawful conduct” by the career staff at the General Services Administration in handing over transition documents to the special counsel’s office. Kory Langhofer, the counsel to Trump for America, wrote in the letter that the special counsel’s office is aware that the GSA “did not own or control the records in question.”

Langhofer noted the special counsel’s office has “extensively used the materials in question, including portions that are susceptible to claims of privilege.”

Mueller’s office did not return FOX News’ request for comment.

Mueller obtained the emails through the General Services Administration (GSA) that were sent using Presidential Transition Team addresses ending in “ptt.gov.”

Axios reports: The emails include 12 accounts, one of which contains about 7,000 emails, the sources said.

The accounts include the team’s political leadership and the foreign-policy team, the sources said.