All Blacks captain in hot water over 'shoulder charge'

All Blacks captain Kieran Read could find himself in hot water if world rugby deems his no-arms tackle at the base of the ruck is deemed reckless.

The veteran gave away a penalty against Canada defending on the line during his team’s 63-0 drubbing in their second World Cup match.

But the tackle came under scrutiny at half-time when replays showed the hulking No.8 dived towards his opponent without his arms.

However, during the broadcast former Wallabies winger Drew Mitchell said he was fine with the call being just a penalty due to the circumstances.

“Out of what happened in that sequence of play...this was just a pick and drive,” he said.

“You see this quite often, you have to get down and it is very hard to wrap an arm when they're in a position, leaning forward and shoulders promoted before the hips.

“Penalty, I am OK with that.”

All Blacks run riot

All three Barrett brothers got on the scoresheet as reigning champions New Zealand stormed to their second victory of the Rugby World Cup with a 63-0 bonus point mauling of Canada at Oita Stadium on Wednesday.

The All Blacks defied the humid conditions to cross four times in the first half and added five more after the break to move into second place behind Italy in Pool B with matches against Namibia and the Italians to come.

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Although a long way from their record World Cup win - a 145-17 thrashing of Japan in 2007 - it was only the second time New Zealand had shut out an opponent at the World Cup after their 40-0 defeat of Scotland in 2007.

Winger Jordie and his fullback brother Beauden crossed in the first half with the third sibling, lock Scott, scoring his try after the break as the Barretts became the first trio of brothers to play for New Zealand at a World Cup.

The All Blacks wore black armbands after the death of former lock Stan 'Tiny' Hill was announced earlier on Wednesday.

Hill, who was once dropped by the All Blacks for being overly physical in a provincial game against South Africa, was 92.

Coach Steve Hansen had spoken at length about using their last three pool matches to finetune their game ahead of the knockout phase and he would have been mostly pleased, especially with the first and third quarters of play.

They played with pace and width, exploited space when it was available and the dual playmakers of Beauden Barrett and Richie Mo'unga grew their combination behind a dominant pack and quick delivery from scrumhalves TJ Perenara and Brad Weber.

Inside centre Sonny Bill Williams was also a huge problem for Canada centres Conor Trainor and Ciaran Hearn, constantly making ground and drawing more than one defender but still able to get his characteristic passes away out of contact.

He also provided a deft kick-through for Beauden Barrett to secure the bonus point shortly before halftime to give the All Blacks a 28-0 lead at the break.

Hansen, however, would have been furious with his side as they bombed at least four other tries in the first half through poor handling, with Scott Barrett the most obvious transgressor when he dropped the ball when he was over the tryline.

They flicked the switch after the break, however, and doubled their score inside the first 10 minutes with tries to Rieko Ioane, Scott Barrett, Shannon Frizell and Weber as they opened up the tiring Canadian defence at will.

With AAP