Three people are assisting police with enquiries after a woman suffered a gunshot wound overnight.
Police were called to Mill Rd, Helensville just before 4am.
The 31-year-old victim is undergoing surgery after being taken to Auckland City Hospital in a critical condition.
Three people, two men and a woman, are helping police with enquiries.
Police are not seeking anyone else as part of their enquiries.
"A scene examination is taking place and the public can expect to see a police officer presence at the address today," says acting detective senior sergeant Megan Goldie.