A group of youths cheered as the victim was put into the ambulance and the man raised a fist for them.
A local resident, who did not want to be named, said he had lived in the area since the 1950s and it was okay then but over the years there had been more violence as tensions grew.
"This place is full of it."
The injured man outside the Fordlands shops. Photo/Ben Fraser
Rotorua police crime prevention manager Inspector Stuart Nightingale said police had made one arrest but more were likely.
Mr Nightingale said there were at least five people involved in the assault.
"The person who was injured was involved in an earlier conflict at a local address," he said.
Rotorua police will continue with increased patrols in the Fordlands area over the course of the investigation.
They would like to hear any information from the public who witnessed the assault or incidents leading up to the assault. Call Rotorua police on (07) 349 9400. Information can also be shared anonymously via Crimestoppers on 0800 555 111.