The NSW Premier has also announced changes to restrictions around New Year's Eve.

New restrictions for Sydney's NYE

Just to reiterate, restrictions have now been tightened for parts of NSW.

For New Year’s Eve in Greater Sydney (including Wollongong, Central Coast and Blue Mountains) the following will apply;

* Household gatherings will be limited to 5 visitors (including children).

* The limit for outdoor gatherings will be reduced from 50 to 30.

* Restrictions for the northern zone of the Northern Beaches remain the same but for the southern zone of the Northern Beaches the following will now apply;

Household gatherings will be limited to 5 visitors from within northern zone (including children).

These changes come into effect from midnight tonight (Wednesday 30 December) and will be in place until further notice.

Transport drivers are no longer unknown cases

Dr Chant has confirmed the two transport drivers who contracted COVID-19, got the virus from a patient with the illness.

Initial testing could not link both drivers to the one passenger, but that link has now been made.

This means there is one less unknown case.

The Wollongong cases

Dr Chant says two of the new cases are members of the same household from the Wollongong area, and one is from northern Sydney.

With the two Wollongong cases, one is a woman in her 50s who was mentioned yesterday and another is a woman in her 20s who is her household contact.

The source is unknown, but the woman in her 50s had travelled to Sydney on the 15th and the 17th, visiting locations in the CBD on the 17th.

"So we have issued advice that people who ate indoors at the Buckleys Sydney on the Opera House Promenade between 7:30pm and 9pm on Thursday 17 December are asked to get tested immediately and isolate until you receive a negative result. Also, people who attended the movie, The Prom, which was an open-air cinema at Lady Macquarie's Chair on the evening of Thursday, 17 December, are also asked to get tested immediately and isolate until you receive a negative result."

Croydon cluster expected to grow says CHO

NSW Chief Health Officer Dr Kerry Chant says the cluster in Croydon is expected to get bigger in the coming days.

"We are expecting that there will be additional cases linked to that cluster just because of the number of close contacts and the close household contact that a number of those contacts had over the period of Christmas and the preceding days," Dr Chant said.