Racing 92 have confirmed second row Ali Williams has been suspended after being arrested on suspicion of possessing cocaine.
Racing - who are not in action this weekend - released a statement on Saturday confirming the former New Zealand international would not be considered for selection until the matter was resolved.
"A player of Racing 92 is at the heart of an investigation into the possession of cocaine," the statement read.
"It was decided to temporarily suspend Ali Williams. If the investigation confirmed the possession of cocaine and the transaction, it would not only be against the law but also a serious breach of our ethics.
"We want to assure our partners, and our supporters of our total determination to uphold our values, and we apologise to all club and sport lovers for the disorder caused, and thank them for their loyalty."