Photo: RNZ / Angus Dreaver
Two youths are due to appear in Hamilton Court after being arrested for an assault in Cambridge last month.
The incident happened on 27 September near a restaurant on Queen Street, with video of the attack posted to social media.
The victim had to have surgery on their face.
"Unfortunately it is becoming more common for youth offenders to film themselves committing offenses and post them to social media," Cambridge Sergeant Ben Joll said.
"This is inexcusable and offending of this nature will not be tolerated in our community."
The youths have been charged with wounding with intent to cause grievous bodily harm.
