The Justice Department has been asked to investigate whether Senate staffers improperly obtained and removed documents from a CIA computer system at a joint facility created by the CIA and the Senate Select Committee on Intelligence (SSCI), TIME has learned.

The referral is the latest exchange in a dispute between the CIA and SSCI that started over Senate Democrats’ efforts to publish a declassified version of their 6,000 page report on the CIA’s program of rendition, detention and interrogation under President George W. Bush. …

Democratic Sen. Mark Udall of Colorado sent a letter to President Barack Obama on Tuesday calling for him to allow publication of the report. “As you are aware, the CIA has recently taken unprecedented action against the committee in relation to the internal review,” Udall wrote.