An elderly man was allegedly bashed by four shoppers at an Auckland Pak'nSave on Monday afternoon.

The 74-year-old man was shopping at the Clendon supermarket about 4pm when he saw four shoppers throwing items off the shelves and on to the ground.

After approaching them and asking them to stop, he was verbally abused and followed to the checkout, a family member posted on social media.

"One dude told my Dad to get f***ed... My Dad then made his way to the checkout and told staff to do something about these guys," the post said.

According to the man's son, the four suspects then continued to hurl abuse before bashing him, breaking the 74-year-old nose, and leaving him with face and jaw injuries.

"My Dad happened to look back at the checkout and the four guys were staying at the back of him and started to swear at my Dad. My Dad turned around again to say something instead he got smashed in the face and broke his nose and damaged his jaw..!!!

"You little c***s. You have messed with the person and Aiga [family].

"You think you're hard smashing a 74-year-old man and breaking his nose."

"How disgusting to hit a defenceless old man, they must have been very brave boys. Such a lack of respect for the elderly!!! I hope these low lives are found and dealt with accordingly," one person said.

Another wrote: "My prayers and thoughts are with him and hope he recovers well. Justice will be served to these little f***ers and I hope it hurts them bad."

The family's social media post has been shared more than 1300 times, gaining more than 7100 reactions.

Pak'nSave and the victim's family have been approached for comment.

The attack comes months after a fight between two customers at Mangere Pak'n Save led to an all-in brawl in October.

Footage showed a group of men punching and kicking each other.

A brave security guard was also struck while trying to break up the brawl.