Nottingham Forest boss Steve Cooper and Newcastle United assistant Jason Tindall were both summoned to speak to Paul Tierney at half-time because of "disagreements" on the touchline.
Sky Sports commentator Seb Hutchinson claimed the pair were warned that they would be sent to the stands if they did not calm down.
He said during the game: "It's interesting actually, at half-time, both Steve Cooper and the Newcastle assistant Jason Tindall were called into the office of Paul Tierney, because of disagreements on the touchline in the first half, from both camps - the referee telling them to just calm down, in his office, otherwise they would both be sent to the stands. Not Eddie Howe, mind."
