Aleksandar Mitrovic could be handed a three game ban for an elbow on Manuel Lanzini in Saturday's 3-0 win over West Ham United.
According to reports the Football Association are reviewing footage of the incident, where the Serbian appears to strike the Hammers midfielder in the head with his arm, midway through the second half of the weekend Premier League encounter.
Should Mitrovic be charged and found guilty he could be forced to sit out three games.
An FA panel of three former referees are independently studying videos of the clash before any announcement of retrospective action is made by the body.
The 22-year-old frontman, known for his hot-headed behaviour, went on to score United's third in the win
Divock Origi link
Newcastle have been linked with a move for Liverpool striker Divock Origi.
The Magpies are desperately hunting for a reinforcements as the summer window edges closer to a close.
And having been linked with a host of names, Origi is the latest to be brought under the spotlight.
United are reported to have made an asked about the player's availability.
Grant Hanley exit talk
It is being reported that Norwich City have agreed a fee with Newcastle for the sale of Grant Hanley.
The defender had looked all set to leave for Derby County earlier this summer, but his wages, understood to be more than £40,000 per week, have proved a stumbling block.
The Rams retain an interest and could yet step in with another bid of their own for the Scotland international.
Some outlets are even reporting Hanley could be set for a Canaries medical.