Countdown's general manager of corporate affairs Kiri Hannifin said the supermarket chain had temporarily removed all knives and scissors from its shelves and would consider whether to continue selling them.
"This is in no way a reflection on our customers, but an act of support for our team.
"We want all of our team to feel safe when they come to work, especially considering the events of yesterday," Hannifin said.
"Our team is a family and when one of our stores is hurting, we all are," she said.
"We're very grateful to our customers who have supported our decision to open a little later, and for all the messages of support we have received last night and today."
Foodstuffs NZ head of corporate affairs Antoinette Laird said it had also removed sharp knives from stores while it reviewed the safety of its customers.
"Everyone deserves to be able to go to work and visit essential services like the supermarket safely," Laird said.
Foodstuffs NZ owns the hundreds of New World and Pak'n Save stores across the country.
"Our thoughts were with the Countdown team and customers injured and affected by the terrible event at Lynn Mall yesterday," Laird said.
Photos taken by the Herald show shelves cleared of knives and scissors at Countdown in Henderson.