The WA Health Department has confirmed a positive COVID test result has been returned from a person within the community on day one of Perth's snap lockdown.The man in his 40s presented for a COVID-19 test yesterday as he had gone to one of the locations visited by the COVID-positive Victorian case.

Perth is in a three-day lockdown after a traveller spent five days in the community while infectious.The person is now working closely with the Department's contact tracing team to determine public exposure sites," a WA Health Department statement said.

Even if you have not visited one of the locations, if you have symptoms, get tested and self-isolate until you get your result. Do not be complacent. It is imperative you always follow the public health instructions."

The lockdown was announced on Friday after a 54-year-old Victorian man tested positive for the virus after completing 14 days of hotel quarantine in Perth.