A new locally acquired Covid-19 case has been detected in Sydney, with authorities scrambling to find the source of the infection.

Sky News Australia has confirmed NSW Health are investigating a mystery case after a Bondi local has tested positive.

Sources close to the Eastern Suburbs local health district told The Daily Telegraph there were reports of a positive case in the Bondi area, which has since been confirmed by several Australian media outlets.

The Health department has released a list of exposure sites -- including the man in his 60s going to David Jones and Myer in Sydney's CBD on Saturday.

He also went to the movies in Bondi Junction on Sunday, as well as venues in Sydney's east.

The man works as a driver and transports international flight crew.

This follows a late night alert from NSW Health on Tuesday, sparking fears of a breach in one of Sydney's quarantine hotels after it was discovered the virus had jumped between three returned travellers.

More to come