NSW authorities tighten coronavirus restrictions as new infection sites emerge across Sydney

Growing COVID-19 clusters in Sydney's northern beaches and inner west, as well as mystery cases elsewhere, have soured the end of 2020 for NSW.

The health experts are calling the new hotspot the Croydon cluster Source: SBS

As NSW health authorities investigate two COVID-19 clusters and three mystery diseases, the list of alerts for potentially infected venues is growing.

It comes after 18 cases of community transmission and a group of six infected people - dubbed by health experts as the Croydon cluster - emerged on Wednesday.

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