A federal grand jury in Washington DC on Friday approved the first charges in the Trump / Russia collusion investigation led by special counsel Robert Mueller, according to the Wall Street Journal.

Citing unnamed sources, the WSJ reported at least one person could be taken into custody as early as Monday. It wasn’t immediately clear who could be charged or for what.

Richard Hibey, attorney for former Trump campaign chairman Paul Manafort, told Fox News that neither he nor any of his colleagues representing Manafort had been informed of any indictment of their client.

Manafort has been the subject of a longstanding investigation due to his dealings in Ukraine several years ago – for which he didn’t file as a foreign agent until June 2017. Manafort had his house raided by FBI agents earlier this summer and was reportedly wiretapped by investigators – before and after the election.

Former National Security Adviser Michael Flynn is another possible target of the probe.

Under the regulations governing special counsel investigations, Deputy Attorney General Rod Rosenstein, who has oversight over the Russia investigation, would have been made aware of any charges before they were taken before the grand jury for approval, according to people familiar with the matter.

This is  a developing story.