Leinster winger Fergus McFadden has been cited for an alleged stamp on Connacht prop Nathan White and will face a disciplinary committee hearing later this week.
The incident occurred during Leinster's 13 – 0 win over Connacht over Connacht last Friday evening.
A Pro12 statement said that the incident happened in the eighth minute of the match and said that the citing hearing would "take place shortly".
Leinster take on the Ospreys in the Pro12 this weekend and are currently second in the table after their win against Connacht.
They are already without prop Cian Healy for the match after he received a two week suspension for striking Toulon hooker Guilhem Guirado with his knee during Leinster's Champions Cup clash in December.