Police are describing the attack on a Lower Hutt speed camera as "unbelievably violent" and "out of proportion".
There are three cameras within about three kilometres of each other on Wainuiomata Road, which connects the Lower Hutt suburb of Wainuiomata to the rest of the city.
The speed camera at the top of the hill has now been shot at with a firearm twice and cut with an angle grinder.
Superintendent Steve Greally says police were alerted to the latest shooting on Christmas Eve.
"I just think they're unbelievably violent and out of proportion... at the end of the day the cameras are there for one purpose and that's to save lives," Mr Greally says.
CCTV cameras have since been installed and police are investigating.
Some residents told ONE News that having three cameras so close to each other shows the police are just after money, but Mr Greally says that's not the case.
"Our police officers around the country get out of bed every morning to prevent families having to go through the hell of losing somebody on the roads," Mr Greally says.
"It is the families who lose out the most."