New Zealand hooker Andrew Hore has been cited for allegedly striking Wales lock Bradley Davies during yesterday's Test in Cardiff.
Davies was laid out by what appeared to be a punch from behind by Hore just seconds into the All Blacks' 33-10 victory. The Cardiff Blues lock later went to hospital to undergo precautionary checks.
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."
Neither referee Craig Joubert nor his assistants saw the ugly incident, but New Zealand coach Steve Hansen had conceded he expected Hore to be cited.
Wales coach Warren Gatland was left distinctly unimpressed and said: "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."
New Zealand today called Chiefs hooker Hika Elliot into their squad in anticipation of Hore's citing, and with Keven Mealamu struggling with a calf problem ahead of next weekend's meeting with England at Twickenham.
Crusaders fly-half Tom Taylor, son of 1987 World Cup winner Warwick, also joined the All Blacks squad with Dan Carter nursing the Achilles injury that forced him to withdraw from the side to face Wales.
Carter was injured during training last Thursday, and the fact that Taylor has been called up as cover suggests he could be struggling to make the final game of the tour against England.
Aaron Cruden, who took over from Carter during the World Cup last year when he suffered an injury during the competition's pool phase, delivered another assured display in his absence against Wales, kicking 18 points.
"Aaron was outstanding," Hansen said.
"He drove us around the park for the first 50 minutes really well.
"His kicking game was exceptional, when a couple of years ago he didn't have a kicking game. He didn't miss one shot at goal, and you can't ask for much more than that."
New Zealand's latest victory extended their unbeaten record to 20 Tests, with Hansen yet to oversee a defeat since he succeeded Graham Henry in the coaching hot-seat last December.
And the current team continues to be described in many quarters as the greatest in New Zealand's rich rugby history.
"What I like about this team is that they want to play rugby, and they are very humble guys in terms of how they give their time," Hansen added.
"The best (New Zealand) side I ever saw was the 1967 side. If people think we are, then that is something I will leave up to them.
"We can get better, and we have to - otherwise we will get passed.
"We were pretty clinical for the first 60-65 minutes (against Wales). We did things pretty well and took our opportunities.
"In the last 20 minutes, we lost our way a bit and kicked away a bit too much ball. But overall, for our second-last game of the season I thought it was 10 out of 10."