The Manhattan U.S. attorney’s office is pursuing an investigation into possible money laundering by Paul Manafort, said three people familiar with the matter, adding to the federal and state probes concerning the former Trump campaign chairman.

The investigation by the U.S. attorney for the Southern District of New York is being conducted in collaboration with a probe by special counsel Robert Mueller into Manafort and possible money laundering, according to two of these people.

A spokesman for Manafort declined to comment. Manafort has previously said he did nothing wrong.

The continuing Manhattan U.S. attorney’s probe, which hasn’t been previously reported, is unfolding at the same time the Brooklyn U.S. attorney’s office pursues an inquiry involving Kushner Cos., owned by the family of President Donald Trump’s son-in-law, Jared Kushner.

Trump has interviewed and is poised to nominate candidates to lead the prosecutorial offices in both Manhattan and Brooklyn. The probes could complicate the confirmation process, especially because Trump is considering individuals with ties to his personal lawyer and to a political ally.

The inquiry in the Manhattan U.S. attorney’s office is being conducted at least in part by Assistant U.S. Attorney Paul Monteleoni, previously a member of the money-laundering and asset-forfeiture unit, who joined the public-corruption team in recent months, according to people familiar with the matter.

Click for more from the Wall Street Journal.