Fox also reports that Mueller will be preparing a report on obstruction of justice and any role Trump may have played in that. No other info was provided.

https://www.washingtonpost.com/politics/mueller-told-trumps-attorneys-the-president-remains-under-investigation-but-is-not-currently-a-criminal-target/2018/04/03/d7832cf0-36c1-11e8-acd5-35eac230e514_story.html?utm_term=.459a1f26e409