The Justice Department is investigating whether former senior FBI officials mishandled classified documents found in a “burn bag” at FBI headquarters, related to the 2016 Russia election interference probe.

No criminal charges have been filed, but critics, including former Trump allies, claim the handling of the Russia investigation was politically motivated.

The FBI’s original probe, Crossfire Hurricane, and subsequent Mueller investigation confirmed Russian interference but found no illegal coordination by Trump campaign officials, though the controversy over the bureau’s actions continues, CBS News has reported.