More than 30 infringement notices were handed out to a group of illegal street racers in Christchurch at the weekend.
Police say the operation was a part of routine work in the Haswell area.
Three vehicles were also impounded, one driver had their licence suspended and seven vehicle compliance notices were issued.
"Reckless and illegal driving activities on our roads put all road users at risk and won't be tolerated. Further operations targeting illegal street racing are planned," a spokesperson said.
Police encourage members of the public to report events if they see them happening and include the vehicle registration if possible.
• Call 111 for emergencies or *555 for road incidents that are urgent but not life-threatening.