The man said a Fire and Emergency lighting unit and police photographer had since arrived at the fatal shooting. A tent was being set up outside the address.
He also saw at least a dozen police vehicles speeding towards Te Atatū Peninsula just after 9pm.
"There were dog handlers, marked and unmarked cars, and also the Eagle helicopter."
A resident on Robert Burke Place in Henderson said she heard what sounded like gunshots followed by a woman's screams around 9pm. Photo / Hayden Woodward
The shooting is the latest in a worsening spate of gun violence across the city.
In recent months a series of tit-for-tat drive-by shootings have terrorised residents in West and South Auckland as tensions between rival gangs the Killer Beez and Tribesmen flared.