New Zealand-based FSL Foods is recalling a brand of frozen mixed berries because of the risk of contamination with metal, according to the Ministry of Primary Industries (MPI).

The Ministry for Primary Industries issued a recall notice for the 1kg pack of Fruzio brand premium mixed berries on Friday evening.

"FSL Foods Ltd is recalling a specific batch of its Fruzio brand premium mixed berries as the product may contain foreign matter (metal),'' the statement says.

People are being asked to check the date mark on the back of the pack and warned that any affected product should not be eaten.

"There have been no reports of injury. However, if you have consumed any of this product and have any concerns about your health, seek medical advice" the notice said.

The affected batch has a date marking of Best Before: 22 Jun 2021 and is sold frozen in a 1kg plastic bag. The product is sold in a number of supermarkets - New World, Pak'nSave and Gilmours stores around the North Island.

The product is not exported, and this recall does not affect any other Fruzio brand products.

The recall comes after dozens of incidents where fresh strawberries in Australia were found with needles pierced into them. There has been one report of an affected strawberry punnet found in New Zealand, sold at the St Luke's Countdown supermarket in Auckland late last month.