Two new COVID-19 cases have been discovered in New South Wales overnight in the Northern Beaches, throwing WA’s border with the state into doubt.

It brings the total number of new cases in the last 24 hours to five, after an airport worker and two other people on the Northern Beaches tested positive yesterday.

It’s thrown the current quarantine free travel with New South Wales up in the air.

Premier Mark McGowan says he’ll wait for the latest health advice before making a decision on whether the border will be closed again.

Infectious diseases expert Dr Clay Golledge told 6PR Breakfast “four cases in the northern beaches is worrying but I don’t think it’s any indication whatsoever to shut the WA border.”

It’s understood the two new cases visited a number of venues in New South Wales while infectious.

“These two new cases are from … quite a long way apart, which may suggest there is low level community transmission going on,” Dr Golledge said.

The source of the two new cases is under investigation and urgent contact tracing and genome sequencing is underway.

“This is five cases in eight million, we really shouldn’t over react and shut the borders until we’ve got more facts and see what the trend is.”

WA was quick to close the borders to South Australia after a suspected outbreak in November.

“I think they really learnt that they did press the button too quickly with South Australia, hopefully that will then give them cause to say let’s take a more conservative approach with New South Wales.”

Click play to hear the full interview. 

(Photo: iStock by Getty Images.)