Photo taken on June 27, 2021 shows an empty street amid the COVID-19 pandemic in Darwin, Northern Territory, Australia. Chief Minister of Australia's Northern Territory (NT) Michael Gunner said on Sunday that NT "is now facing its biggest threat" since the COVID-19 crisis began, adding that its capital city Darwin would enter a lockdown for 48 hours. The full lockdown was effective from local time 1:00 p.m. on Sunday at Darwin, Palmerston and Darwin rural areas, following confirmation of four new COVID-19 positive cases linked to a mine, according to the NT government's statement. (Photo: Xinhua)

Photo taken on June 27, 2021 shows an empty street amid the COVID-19 pandemic in Darwin, Northern Territory, Australia. Chief Minister of Australia's Northern Territory (NT) Michael Gunner said on Sunday that NT "is now facing its biggest threat" since the COVID-19 crisis began, adding that its capital city Darwin would enter a lockdown for 48 hours. The full lockdown was effective from local time 1:00 p.m. on Sunday at Darwin, Palmerston and Darwin rural areas, following confirmation of four new COVID-19 positive cases linked to a mine, according to the NT government's statement. (Photo: Xinhua)

Photo taken on June 27, 2021 shows a view of Darwin, Northern Territory, Australia. Chief Minister of Australia's Northern Territory (NT) Michael Gunner said on Sunday that NT "is now facing its biggest threat" since the COVID-19 crisis began, adding that its capital city Darwin would enter a lockdown for 48 hours. The full lockdown was effective from local time 1:00 p.m. on Sunday at Darwin, Palmerston and Darwin rural areas, following confirmation of four new COVID-19 positive cases linked to a mine, according to the NT government's statement. (Photo: Xinhua)

Photo taken on June 27, 2021 shows a view of Darwin, Northern Territory, Australia. Chief Minister of Australia's Northern Territory (NT) Michael Gunner said on Sunday that NT "is now facing its biggest threat" since the COVID-19 crisis began, adding that its capital city Darwin would enter a lockdown for 48 hours. The full lockdown was effective from local time 1:00 p.m. on Sunday at Darwin, Palmerston and Darwin rural areas, following confirmation of four new COVID-19 positive cases linked to a mine, according to the NT government's statement. (Photo: Xinhua)