The death of a boxer during a charity event in Hamilton, has sparked calls to regulators to tighten rules.

LISTEN ABOVE: Keith Walker spoke to Larry Williams about whether there should be more limits on amateur boxing

Neville Knight, 49, collapsed and died in the ring at the Young Guns 2 fundraiser hosted by Nabby's Boxing Gym at Te Rapa Racecourse on Saturday night.

Amateur International Boxing Association supervisor Keith Walker told Larry Williams corporate charity boxers aren't put under the same safety scrutiny, as amateur and professional boxers.

He'd like to see an age limit of 40 at these events.

"Boxing New Zealand do have some regulations but certainly they are affiliated to the world body, which is IABA, and they should be governing boxing under those rules."

Boxing New Zealand won't be making a statement until more is known about the incident.