It is reported that Pulis instructed his players to come in for training on Monday despite previously indicating that the squad could have a day off and a Christmas party in London at the weekend.
The Sun claims that Beattie "protested on behalf of his team-mates" and that "punches were thrown" as the two were pulled apart.
Indeed, the Daily Mail also alleges that Pulis aimed a butt at his striker, who joined the club from Sheffield United in January 2009.
Potters chairman Peter Coates would only tell the Stoke Sentinel: "As far as the club is concerned, this is an internal matter and will be dealt with internally."
It has emerged that Beattie did not train with his team-mates on Monday, although he was present at the training ground for around 30 minutes.