“Potential links to diplomats, aircrew and other people who may have had contact with international travellers have been investigated and no source of the Avalon cluster has been identified at this point,” a spokeswoman said.
She said all exit screening tests on people who had been self-isolating on the northern beaches during that period came back negative.
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“Questions around reciprocal arrangements with foreign governments overseas should be directed to the Commonwealth government,” she added.
Federal Chief Medical Officer Professor Paul Kelly has previously expressed confidence that the northern beaches strain derived from a female traveller in hotel quarantine who arrived in Australia from the United States on December 1.
New South Wales records 18 new locally-acquired cases of coronavirus with SIX in a new mystery cluster in Sydney s inner-west - as Gladys Berejiklian tightens restrictions for NYE
NSW recorded 18 local cases of covid-19 with nine linked to Avalon and six to new mystery Croydon cluster
Officials expect the cluster to increase this week because an extended family had about 34 close contacts
Two mystery cases from same household in Wollongong and another unlinked case is from northern Sydney
Premier Gladys Berejiklian has tightened rules for NYE, restricting home visitors to five and gatherings to 30
Anyone who visited a venue marked with a red dot must isolate for 14 days.
People who have been to a location marked with an orange dot must isolate until they receive a negative test.
Blue dots indicate that visitors should monitor their symptoms to ensure they are not infected, and green locations mean the venue no longer has a public health alert.
Mr Tsang announced the website on Twitter and said the information was constantly updated using figures from Data NSW and NSW Health. Introducing Covid-19 Near Me (NSW) - a new tool to help you keep track of new case locations, he wrote.
Bride and groom at centre of Sydney s Covid wedding were fined for leaving the Northern Beaches dailymail.co.uk - get the latest breaking news, showbiz & celebrity photos, sport news & rumours, viral videos and top stories from dailymail.co.uk Daily Mail and Mail on Sunday newspapers.