A witness who was shopping at Countdown LynnMall during Friday afternoon's attack says he nearly attempted to hit the attacker before an undercover police officer leapt into action.
St John has confirmed there are six patients following the attack including three in a critical condition and one in a serious condition.
Shoppers were forced to flee the west Auckland mall in terror after a man attacked other shoppers on Friday, before being shot dead by police.
Amit Nand told Newshub he was browsing the aisles when he heard people "screaming and running", some shouting that others had been "stabbed".
"I was walking and saw the guy... it was me and the [attacker] and another guy," said Nand, describing the attacker's weapon as "a big kitchen knife".
"I went by him and I told him to 'drop the f***ing knife'. I saw three people stabbed."
Nand says he was considering attempting to subdue the attacker himself before he was approached by an undercover police officer.
"This undercover cop came to me and said 'get back' and he started shooting him."
The attacker was reportedly shot five times.
Nand says he grabbed tea towels and packs of nappies off shop shelves, using first aid training to cover victims' wounds.
He claims one victim was stabbed in the head and stomach.
"[One woman's] head was pushed on the food so I had to put something on it because she didn't want to get up. I gave her something for her head. She was stabbed in her head and her stomach."
Despite his actions, Nand told Newshub he didn't want to act "the hero" during the attack.
"I've got three kids," he explained.
Updated information about Friday's attack can be found here.