South Australia has posted its biggest daily spike in COVID-19 cases for almost seven months with five new infections reported on Thursday.
But SA Health says all five are returned overseas travellers in hotel quarantine and pose no risk to the wider community.
They include a teenager, one man in his 20s, two women in their 30s and a man in his 40s who all tested positive for the virus on arrival.
It's SA's largest number of positive cases in a single day since seven were reported on April 10 at the tail end of the first wave of the pandemic.
It has also taken the number of active infections to 16, but all are in hotel isolation.
SA has now reported 509 cases of coronavirus this year while the total number of tests conducted has climbed above 565,000.
SA Health said 3444 of those were conducted on Wednesday.