Scottish FA chief executive Stewart Regan:

“I can confirm I have concluded my investigation into the events during the recent Clydesdale Bank Premier League match between Dundee United and Celtic. During this investigation, I spoke to the match referee, Dougie McDonald, his assistant, Steven Craven, Hugh Dallas, the Head of Referee Development, and Jim McBurney, the referee observer.

“On concluding my own investigation, and adopting due process, the matter has now been referred to the Referee Committee for consideration at their next scheduled meeting, which will be held on Friday, October 29. It would therefore not be appropriate to comment any further until the committee has met.”