The major supermarket in Double Bay was added to the venues list as a site where people were potentially exposed to the virus.

Those at the store between 10.45am and 11am on Monday, May 3, are being considered as casual contacts to a known infection, NSW Health said on Saturday morning.

“NSW Health has identified a new venue of concern as part of ongoing investigations into the two locally acquired cases of COVID-19 reported earlier this week,” the department wrote on Twitter.

“Anyone who attended the following venue at the time listed below is considered a casual contact and should get tested immediately and isolate until a negative result is received. Continue to monitor for symptoms, and if they appear, get tested again.”

RELATED: NSW records no new local cases

The update comes as health authorities reported zero new locally acquired cases on Saturday, with six returned overseas travellers testing positive in quarantine.

There were fears that a lockdown would be implemented over the Mother’s Day weekend after a couple in their 50s contracted the virus, with tracers unable to pinpoint how they became infected.

A man in his 50s from Sydney’s eastern suburbs tested positive for COVID-19 on Wednesday, and contact tracing alerts from the case now cover more than a dozen suburbs across the city.

Genome sequencing has linked the man’s case to a returned traveller from the US, who had an Indian variant of the virus, but it is not yet known how the virus spread between them.

The man’s wife had also tested positive to the virus with Premier Gladys Berejiklian on Wednesday praising the man’s use of QR codes to accurately record his movements.

“This person did everything right, but it goes to show that we can't take a single thing for granted,” she told reporters during the week.

“It goes to show we have to maintain our social distancing, have to make sure we have good hand hygiene, we need to get tested with the mildest of symptoms, and very importantly and significantly, we need to use QR codes.”

Anyone who visited the following venues at the specified times are considered close contacts and should get tested immediately, and isolate for 14 days regardless of result:

BONDI JUNCTION: Screening of The Courier at Event Cinemas, Friday April 30; 6:00pm to 8:00pm

COLLAROY: Alfresco Emporium, 1021 Pittwater Rd, Tuesday May 4; 1:00pm to 1:30pm

MOORE PARK: The Stadium Club in the Entertainment Quarter, 122 Lang Rd, Monday May 3; 11:30am to 12:30pm

PADDINGTON: Barbetta at 1 Elizabeth Street in Paddington between 1.30pm and 2.30pm April 30.

ROSE BAY: The Royal Sydney Golf Club on Kent Rd, Monday May 3; 5:30pm to 9:00pm

RUSHCUTTERS BAY: Figo restaurant; 3/56-60A Bayswater Road; Friday April 30; 8.45-11pm

SYDNEY: HineSight Optometrist at the Sofitel Sydney Wentworth between noon and 1pm on April 30.

Visit the NSW Health website for the full list of venue alerts.