SkyCity has identified around 1000 patrons and 240 staff who were in the casino when a Covid-positive case visited the gaming floor.
Covid-19 cases are expected to rise in New Zealand's Delta outbreak and locations of interest have spiralled to around 70 sites.
The potential exposure window SkyCity was between 1.15am to 3am on Saturday, and the staff and customers identified are deemed close contacts.
Public health authorities have advised that all the staff self-isolate, contact Healthline and get tested, SkyCity chief executive officer Michael Ahearne said in a statement
SkyCity is contacting workers staff to pass on the public health advice, the statement said.
The casino estimates about 1000 customers were on the main gaming floor during the time that the positive case visited.
"Public Health Authorities have advised that all customers who were on the main gaming floor at the same time are deemed close contacts and are advised to stay at home, watch for symptoms and get tested," Ahearne's statement said.
SkyCity is closed, with a small number of workers still on site carrying out security and surveillance duties, and caring for a small number of guests at the SkyCity Grand Hotel.
A specialist team will carry out a deep clean of the main gaming floor, all public lifts, handrails, and back of house area will undergo.
SkyCity is continuing to work with public health services to provide necessary information for contact tracing purposes.
New locations of interest were added to the Ministry of Health website today. They are Hoyts Cinemas - Wairau Park, Domino's Pizza Beach Haven, Countdown Takapuna, Remuera Exchange, Z Harris Road Service Station, Movie Monterey Takapuna and KFC Takapuna.
As many as 900 people may have passed through one of the busy central Auckland bars visited by a Covid-positive case on Friday night.
Bar 101 in Elliot St promotes itself online as Auckland's premier student nightclub.
It is owned by the Lawrenson Group, whose chief executive, John Lawrenson, says it was quieter than usual that night.
He estimates about 400 people may have been in the bar at the same time as the case in the two hours from 11.30pm.
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Kia Kaha - Stay Strong