Coronavirus Australia live: Isolation warning for Thai Rock patrons

Sydney diners have been warned to isolate as virus detectives work to figure out how the city's most concerning cluster keeps spreading.

NSW Health has issued a warning for Sydney diners as public health detectives work to figure out how the city's worst cluster seems to keep spreading.

Health authorities is asking anyone who attended the Thai Rock Restaurant at Potts Point, in Sydney's east, for two hours or more between July 15 and July 25 to immediately be tested for coronavirus and self-isolate for 14 days since they were there, regardless of symptoms.

Anyone who was there between the same dates for less than two hours should watch for symptoms and immediately isolate and seek testing if they appear.

The warning from NSW Health comes after a person who attended Thai Rock Potts Point on July 17 tested positive.

A staff member at the restaurant has now tested positive, and the venue has been closed for cleaning.

Investigations into the source of the infection and contact tracing are under way.

The owners of Thai Rock Potts Point also own Thai Rock in Wetherill Park, a cluster that now has 67 cases of coronavirus linked to it.

NSW Health said investigations to date have not identified links between cases at the two sites.

Meanwhile, Victoria recorded 459 new COVID-19 cases and 10 new deaths today, marking the state's deadliest day since the pandemic began. 

BE FIRST TO KNOW: Download the news.com.au app for breaking news alerts on the latest coronavirus developments

Follow our live coverage below for all your coronavirus updates.