The occupants of two cars left a trail of chaos after shooting fireworks at each other's windows as they sped through through Selwyn chasing each other.
Senior Constable Chris Caldwell, of Rolleston police, said the incident in Selwyn on Saturday, resulted in a fire breaking out in a hedge.
The fire left significant damage to several hedge-rows and gardens and threatened to spread to a house.
A ride-on lawn mower sitting near one of the hedges was incinerated by the fire and the occupants of the property were evacuated for the night while fire crews dampened down and monitored overnight.
Police were seeking to identify the two cars, which were a BMW and a Mazda RX8.
About 7pm on November 3, a witness reported seeing the cars, which appeared to be chasing each other, in Newtons Road shooting fireworks at each other out the windows.
They were then seen speeding off in the direction of West Melton.
Police said it seemed likely the occupants of the both vehicles knew each other, and they may not have realised their actions started a fire, as they had fled before it started.
However, their actions were extremely dangerous given the high winds at the time.
The BMW is described as silver, with 18 inch mag wheels.
The RX8 is a distinctive metallic blue with tinted windows, black wheels, and white writing on an angle on the rear windscreen.
Police continued to make inquiries to identify these vehicles, but wanted to speak with the occupants of these vehicles, or anyone else who has information on these vehicles or their movements on Saturday evening.
