UPDATE: Fixed the links.
According to The Sun (and various other sources, see this), Joey Barton has been charged by the FA with Violent Conduct for punching Morten Gamst Pedersen on Wednesday.
The charge means that Barton will likely be suspended for the next three games. A three game suspension is never good, but it's especially bad timing as Cheik Tiote will be forced to sit for one match as he has now picked up five yellow cards.
More on this as it unfolds.