WASHINGTON (Reuters) - The Pentagon said on Tuesday that it was unable to share documents with the House of Representative committee pursuing an impeachment inquiry of President Donald Trump, citing “legal and practical concerns.”

In a letter seen by Reuters, the Pentagon said the House of Representatives did not have a resolution authorizing an impeachment investigation, adding that it could not produce documents in the eight days it was given to comply with the subpoena.

“The Department is unable to comply with your request for documents at this time. Nevertheless, the Department respects the oversight role of the appropriate committees of Congress, and stands ready to work with your committees should there be an appropriate resolution of this matter,” the letter said.