Australia news live update: Covid restrictions for greater Sydney as medical chief says ‘missing link’ in NSW cases still unknown

What [testing] showed is that the sequence from our new case matched with an overseas case, who had travelled from the US and went to the Park Royal at Darling Harbour.

The person was tested on day one, and was positive and was moved to the SHA, the Sydney Health Accommodation, on 28 April.

We are currently reviewing CCTV footage to look at how the transmission got from this individual to our case and what we’re concerned about is that there is a missing link, because there is no direct contact that we’ve been able to establish yet, between the cases.

As you can imagine, there are strict procedures around the person being admitted to the quarantine facility and then transferred to our health quarantine facility.

We can’t find any direct link between our case, so what we’re concerned about is there is another person that is as yet unidentified that infected our case.