From CNN …
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.
As best, I can tell there’s no clarity on who has been charged or what crimes they have been charged with. Here’s a thread on Twitter, from a former federal prosecutor, setting forth some theories about what this could mean. Obvious candidate: Paul Manafort.