10 year old stabs classmate

NZPA reports:

A South Auckland school boy who did not like the way he was tackled in a schoolyard game of touch rugby allegedly stabbed his 10-year-old school mate.

The boy was stabbed with a weapon, believed to be a small kitchen knife, behind a classroom at decile 1 school Jean Batten Primary in Mangere last Wednesday, the New Zealand Herald reported.

Police said both boys were aged 10 – but it was understood the victim was in Year 6 and his alleged attacker in Year 4.

I can’t believe this happens in New Zealand. How does a 10 year old even have a knife at school, let alone think an appropriate reaction to a tackle is to stab a fellow 10 year old with a knife?