Leinster and Ireland back Fergus McFadden has been cited following an alleged stamping incident in the Pro12 win over Connacht on New Year's Day.
A Pro12 statement said that the incident happened in the eighth minute of Leinster's 13-0 win.
Video footage showed McFadden appearing to make contact with the head of Connacht's Nathan White during a ruck.
Under rule 10.4, which includes stamping or "trampling", an offence can lead to a ban of a number of weeks.
The statement said that the citing hearing would "take place shortly".
Leinster moved above Connacht into second place in the Pro12 table after winning the Irish inter-provincial derby.
McFadden has 29 Ireland caps but missed out on a place in the squad for the World Cup.