A Wollongong man in his 30s is one of three new mystery cases of COVID-19 in the state being investigated by NSW Health.
The case has not currently been linked to the Crossroads Hotel outbreak, NSW Health said.
The department has also put out a warning that a separate case, linked to the Crossroads Hotel, has been found in a person who dined at Rashays in North Wollongong on July 11.
Anyone who attended that venue, especially between 7-9.30pm, should remain alert for symptoms of coronavirus and get tested.
"Anyone feeling unwell - even with the mildest of symptoms such as a runny nose or scratchy throat - is urged to seek testing and self-isolate," NSW Health said.
"Do not go to work or catch public transport until you are cleared of COVID-19."
Earlier, NSW Chief Health Officer Dr Kerry Chant revealed urgent contact trancing was underway to try to find the source of the three unconnected cases.
The others include a woman in her 40s from Western Sydney and a woman in her 40s from South Western Sydney.
All three cases, including the man from Wollongong, are currently isolating at home, NSW Health said.
"We are concerned when we find cases that can't be linked back, because that indicates we've missed a chain," Dr Chant said.
"We do need people to continue to practise social distancing, isolate with the minimum of symptoms and get tested."
Further assessment and contact tracing as required is underway at Rashays, NSW Health said.
More to come.