A Caringbah hotel and Kurnell cafe have been linked to a coronavirus case diagnosed in Victoria.
Victoria Department of Health reported the person had lunch on July 5 at Cook@ Kurnell and dinner on the same day at Highfield hotel.
Another person who was diagnosed with the disease in Victoria visited venues in southern NSW.
"While investigations are underway, NSW Health urges anyone who attended these venues at these times must watch for respiratory symptoms or fever, and if they occur, isolate and get tested for COVID-19 right away," a spokesman said.
Fourteen new cases were diagnosed in NSW in the 24 hours to 8pm last night.
They included four returned travellers in hotel quarantine and two NSW residents who acquired their infection in Victoria and have been isolating since their return.
The other eight new cases counted today include five who attended the Crossroads Hotel in Casula, and three are contacts of cases who were at the hotel. They are isolating.
"It is essential that we all take the risk of transmission very seriously and take steps to protect ourselves and loved ones," NSW Health said.
"If you have even mild symptoms, a cold or cough, get tested and stay home until you're cleared.
"Keep your distance from others at all times even if you are well.
"If you have been in Victoria, don't mix with other people until two weeks has passed.
"People who work in high-risk settings such as health care facilities or aged care homes must not to attend work if they have symptoms and must get tested immediately.
"People should also not visit relatives in these settings if they have even the mildest of symptoms or have recently returned from Victoria."
A total of 10,786 tests were notified in the 24-hour reporting period, compared with 14,975 tests in the previous 24 hours.
There are 85 COVID-19 cases being treated by NSW Health, with one in intensive care.
This person does not require a ventilator. In NSW, 2,799 people are known to have recovered from COVID-19.