A man working on a building site was seriously injured in an accident with a concrete cutter.
The accident happened in Herne Bay, Auckland, about 10am yesterday.
The Auckland Helicopter Emergency Medical Service (HEMS) was asked to help an ambulance crew at the building site.
"The patient had a significant wound and, thanks to a first aider who treated him on the spot, and us and ambulance transporting him to hospital in a timely manner, he is now in a stable condition," an Auckland Rescue Helicopter Trust spokeswoman said.
A doctor from HEMS rode in the ambulance with the patient as the injury had the potential to be quite serious, the spokeswoman added.