A man who lives near a South Auckland home where a woman and a man were found dead on Thursday says he saw a car "bolting up the street" before hearing gunshots.Police say they are speaking with a 30-year-old male - who is in their custody - in relation to the double homicide.It comes after police continued their hunt for those responsible.Detective Inspector Tofilau Faamanuia Va'aelua of Counties Manukau CIB said police are working to determine if the 30-year-old was involved."Police will provide further updates as they are available."A neighbour, who only wished to use his first name Robbie, said he was outside having a cigarette when the incident unfolded."We hear a car come bolting up the street and he stopped in front of that house there," he said."He slammed on the breaks, got out ran up the drive and all we hear after that is 'pop, pop, pop, pop'."Robbie said he then heard the car driving away and then the sound of a woman screaming.Early on Friday morning, two police officers with rifles were outside the cordoned-off home.Police at the scene on Friday morning.RNZ / Jessica HopkinsPolice forensic and crime scene officers were also seen putting on shoe covers and entering the home just before 6.30am.Emergency services responded to reports of a woman unresponsive at an address on Gambare Place about 1.45pm on Thusday.The woman was pronounced dead at the scene and, during a search of the property, police found a man who was also pronounced dead.Va'aelua said the offender or offenders fled the scene prior to officers arriving.On Thursday evening, armed police stood guard in front of the house, as neighbours looked on.RNZ / Jessica HopkinsDianna Kereopa-Turner had lived in the street her whole life. She told RNZ she had just returned home when "havoc started going on" outside."We thought it was our nail gun for our sleepout that we're building going off ... and then it was quite loud," Kereopa-Turner said."But no, it was shooting. All we heard was gun. Then my sister came out of her room and said 'somebody out there's shooting', so we gathered in whoever was loose around the house and stayed inside."She said the victims had only just moved in to the street: "It's sad to know that whatever trouble was following them, obviously followed them right to the doorstep, and unfortunately it happened on this street where there's a lot of kids and a lot of elderly people."Cordons in place around the house.RNZ / Erin JohnsonMany residents had been unable to return to their homes on Gambare Place and adjoining Volante Avenue while police cordons closed the roads on Thursday afternoon, with armed police stationed at the cordons.Another Gambare Place resident, Bobbie, said she had been at the doctors and tried to return home around 2.45pm."The street was already closed off, so I thought, 'oh better shoot over to the school and pick up my niece', got over there and it was locked down as well."Bobbie said they were allowed to go home just after 5pm.She said, once home, she talked with neighbours and some were quite shocked.While the cordon was in place, police were seen working behind a white tarpaulin on Volante Avenue. Police later confirmed staff had moved the victims to a safe location, away from the scene, to render first aid, while other staff continued working to clear the scene and make it safe.Va'aelua said the incident appeared to be isolated, but police were not able to "rule anything out", and were now determining the exact circumstances of the incident."This is an awful set of events and no doubt unsettling for everyone involved and the wider community."Anyone with information on the incident that could help police with enquiries could contact 105.