CANBERRA, AUGUST 12

Australia's capital will go into lockdown for a week from Thursday after a single case of COVID-19 was detected and the virus was found in wastewater.

Canberra joins Sydney, Melbourne and several cities in New South Wales state that are locked down due to the delta variant.

Canberra residents can only leave home for essential reasons from 5 p.m. on Thursday, general retail stores will be closed and hospitality venues will only to able to sell takeout, an Australian Capital Territory government statement said.

Schools will be open to students who cannot stay at home.

The infection is the first locally-acquired case in the city of 460,000 since July 10 last year.

A Canberra resident, a man aged in his 20s, had been infectious in Canberra since Sunday and tested positive on Thursday, Australian Capital Territory Chief Health Officer Kerryn Coleman said.

The source of the infection was unknown, she said. Coronavirus was detected in wastewater late Wednesday, she said.

The lockdown starts on the final day of a two-week sitting of the Federal Parliament.