Three people from New South Wales and a Victorian woman were charged after police stopped their car on a dirt road in rural South Australia.
Four people have been charged after allegedly lying to South Australian police near the Victorian border on Wednesday night.
Police say they stopped a car on a dirt road near Loxton, in the Northeast Riverland region, around 5.30 p.m.
One of the passengers, a 34-year-old man from New South Wales, allegedly admitted to being in a restricted area and was arrested, police said.
He was charged with violating the Emergency Management Act and faced court on Thursday.
Police will allege that three others in the vehicle gave different accounts of where they had been in the previous 24 hours.
The 50-year-old Victorian woman, the 31-year-old New South Wales woman and a 32-year-old New South Wales man were placed in a medical hotel while officers investigated their movements, police said.
The trio were arrested Thursday and charged with violating the Emergency Management Law.
They were denied police bail and will appear in Adelaide Magistrates Court on Friday.
Only essential travelers or those in a few exceptional circumstances can cross the South African border from Victoria or NSW due to the ongoing Covid-19 outbreaks in both states.