Castres players, Marc-Antoine Rallier and Rory Kockott, have both been cited for incidents during their side's win at home to Munster on Saturday.
Backup hooker Rallier has been cited for a dangerous tip tackle on Peter O'Mahony in the 69th minute. He was shown a yellow card at the time.
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Scrum-half Kockott has cited for an alleged eye gouge on Munster's South African back row, Chris Cloete, in the 21st minute of the game.
At the low of the disciplinary scale, Kockott could receive a 12-week ban, at the high end, it could be anywhere between 24 and 208 weeks.
Both citing complaints were made by match citing commissioner, Chris Catling.
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