New Zealand hooker Andrew Hore has been cited for his clash with Wales lock Bradley Davies in the opening minutes on Saturday.
Neither referee Craig Joubert nor his assistants saw the ugly incident, but New Zealand coach Steve Hansen admitted he expected his hooker to be cited.
Wales coach Warren Gatland was enraged by the incident, saying: "It does not look the best in the world. It looks like he (Davies) has been caught from behind.
"You do not associate the All Blacks as being a side that resort to cheap shots, and I hope that is not the case and that maybe it was an accident.
"Bradley was a big loss to us and it took us a bit of time to cope."
A Six Nations Committee statement said: "Andrew Hore, hooker for New Zealand, has been cited by the IRB's independent Citing Commissioner for allegedly striking an opponent during the match between Wales and New Zealand at the Millennium Stadium on Saturday.
"The relevant incident occurred in the second minute of the match and involved Wales lock forward Bradley Davies.
"The time and date of the hearing, before the IRB's appointed independent
judicial officer, have yet to be fixed."
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