Five months after Assistant Attorney General Rod Rosenstein tasked Robert Mueller with taking over the Justice Department investigation into possible collusion between the Trump campaign and Russia, CNN is reporting that the first charges have been filed, and that arrests could be made in the coming days.

A federal grand jury in Washington, DC, on Friday approved the first charges in the investigation led by special counsel Robert Mueller, according to sources briefed on the matter.

The charges are still sealed under orders from a federal judge. Plans were prepared Friday for anyone charged to be taken into custody as soon as Monday, the sources said. It is unclear what the charges are.

A spokesman for the special counsel's office declined to comment.

To be sure, CNN's version of events leaves room for doubt. And importantly, it doesn't name the subject of the charges.