The Football Association have to look interested because referee Jon Moss has included details of the bust-ups in his report.
But disciplinary chiefs are set to go easy on the players involved and both clubs.
An FA spokesman said: "It has been reported to us and we are looking into it."
Habib Beye is understood to have sustained an injury after being caught by a kick during the disturbance in the tunnel which could keep him out of Saturday's game at Leyton Orient.
Both Newcastle's caretaker boss Chris Hughton and Huddersfield counterpart Lee Clark, the former Magpies midfielder, were quick to play down the confrontations.