A federal grand jury in Washington 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. The White House also had no comment, a senior administration official said Saturday morning.