Four people were stabbed on Monday in a supermarket in Dunedin on New Zealand's South Island, police said after detaining the man believed to have been responsible.
Police arrived to find shoppers at the Countdown supermarket had detained the attacker. The victims are in hospital along with the alleged assailant, who is under police guard.
Prime Minister Jacinda Ardern said the attack did not appear to be terror-related.
“I am advised and I do caveat that this is early stages, I am advised that at this stage there is nothing to suggest from the police's perspective that this is what they would define as a domestic terror event."
The country has been on high alert for terrorism-related attacks after a white supremacist gunman killed 51 people in two mosques in Christchurch in 2019.
Police said they had yet to formally interview or charge the alleged offender and would investigate the motive for the assault.