Queenstown Lakes District Council posted a photo of the group, showing one male and one female leaning over the side of the bridge ready to jump into the river below, on its Facebook page.
“Do we really need to say that this type of activity is not acceptable at a time of national lockdown?
“Please don’t do it, for the good of the community, and out of respect for our medical professionals and emergency services.”
At least ten people look to have been involved, wearing swimming costumes, and not observing social distancing rules.
The country is currently in lockdown on Alert Level 4 because of Covid-19. People are asked only to leave their homes for essential reasons and exercise.
The council said police were notified.
Police said when they arrived the group had already left.